...and has always represented the time of day in 100th of seconds.  When
tools::Time had been changed to 64 bit nanoseconds in
9830fd36 "date/time IDL datatypes incompatible
change", conversion between the two has apparently been forgotten, so that
CppunitTest_desktop_lib under (new-in-Clang)
-fsanitize=implicit-signed-integer-truncation failed with

> xmlsecurity/source/component/documentdigitalsignatures.cxx:536:38: runtime error: implicit conversion from type 'sal_Int64' (aka 'long') of value 192536379741069 (64-bit, signed) to type '::sal_Int32' (aka 'int') changed the value to 1585795981 (32-bit, signed)
>  #0 in DocumentDigitalSignatures::ImplVerifySignatures(com::sun::star::uno::Reference<com::sun::star::embed::XStorage> const&, com::sun::star::uno::Reference<com::sun::star::io::XInputStream> const&, DocumentSignatureMode) at xmlsecurity/source/component/documentdigitalsignatures.cxx:536:38 (instdir/program/libxmlsecurity.so +0x488319)
>  #1 in DocumentDigitalSignatures::verifyDocumentContentSignatures(com::sun::star::uno::Reference<com::sun::star::embed::XStorage> const&, com::sun::star::uno::Reference<com::sun::star::io::XInputStream> const&) at xmlsecurity/source/component/documentdigitalsignatures.cxx:296:12 (instdir/program/libxmlsecurity.so +0x484ea6)
>  #2 in non-virtual thunk to DocumentDigitalSignatures::verifyDocumentContentSignatures(com::sun::star::uno::Reference<com::sun::star::embed::XStorage> const&, com::sun::star::uno::Reference<com::sun::star::io::XInputStream> const&) at xmlsecurity/source/component/documentdigitalsignatures.cxx (instdir/program/libxmlsecurity.so +0x4890fa)
>  #3 in SfxObjectShell::ImplAnalyzeSignature(bool, com::sun::star::uno::Reference<com::sun::star::security::XDocumentDigitalSignatures> const&) at sfx2/source/doc/objserv.cxx:1368:47 (instdir/program/libsfxlo.so +0x3866a04)
>  #4 in SfxObjectShell::ImplGetSignatureState(bool) at sfx2/source/doc/objserv.cxx:1397:74 (instdir/program/libsfxlo.so +0x3869118)
>  #5 in SfxObjectShell::GetDocumentSignatureState() at sfx2/source/doc/objserv.cxx:1575:12 (instdir/program/libsfxlo.so +0x3863e57)
>  #6 in SfxObjectShell::CheckForBrokenDocSignatures_Impl() at sfx2/source/doc/objmisc.cxx:974:38 (instdir/program/libsfxlo.so +0x3812535)
>  #7 in SfxObjectShell::CheckSecurityOnLoading_Impl() at sfx2/source/doc/objmisc.cxx:924:5 (instdir/program/libsfxlo.so +0x38120bc)
>  #8 in SfxObjectShell::FinishedLoading(SfxLoadedFlags) at sfx2/source/doc/objmisc.cxx:1072:9 (instdir/program/libsfxlo.so +0x3818a89)
>  #9 in SwDocShell::LoadingFinished() at sw/source/uibase/app/docsh.cxx:1200:5 (instdir/program/libswlo.so +0xcfd4f08)
>  #10 in SwDocShell::Load(SfxMedium&) at sw/source/uibase/app/docshini.cxx:582:13 (instdir/program/libswlo.so +0xd091a39)
>  #11 in SfxObjectShell::LoadOwnFormat(SfxMedium&) at sfx2/source/doc/objstor.cxx:3053:20 (instdir/program/libsfxlo.so +0x3895e54)
>  #12 in SfxObjectShell::DoLoad(SfxMedium*) at sfx2/source/doc/objstor.cxx:725:40 (instdir/program/libsfxlo.so +0x389bdd5)
>  #13 in SfxBaseModel::load(com::sun::star::uno::Sequence<com::sun::star::beans::PropertyValue> const&) at sfx2/source/doc/sfxbasemodel.cxx:1795:36 (instdir/program/libsfxlo.so +0x3a40e1e)
>  #14 in (anonymous namespace)::SfxFrameLoader_Impl::load(com::sun::star::uno::Sequence<com::sun::star::beans::PropertyValue> const&, com::sun::star::uno::Reference<com::sun::star::frame::XFrame> const&) at sfx2/source/view/frmload.cxx:688:28 (instdir/program/libsfxlo.so +0x40c30c0)
>  #15 in framework::LoadEnv::impl_loadContent() at framework/source/loadenv/loadenv.cxx:1149:37 (instdir/program/libfwklo.so +0x1520131)
>  #16 in framework::LoadEnv::startLoading() at framework/source/loadenv/loadenv.cxx:383:20 (instdir/program/libfwklo.so +0x1510b16)
>  #17 in framework::LoadEnv::loadComponentFromURL(com::sun::star::uno::Reference<com::sun::star::frame::XComponentLoader> const&, com::sun::star::uno::Reference<com::sun::star::uno::XComponentContext> const&, rtl::OUString const&, rtl::OUString const&, int, com::sun::star::uno::Sequence<com::sun::star::beans::PropertyValue> const&) at framework/source/loadenv/loadenv.cxx:169:14 (instdir/program/libfwklo.so +0x150c7c8)
>  #18 in framework::Desktop::loadComponentFromURL(rtl::OUString const&, rtl::OUString const&, int, com::sun::star::uno::Sequence<com::sun::star::beans::PropertyValue> const&) at framework/source/services/desktop.cxx:619:12 (instdir/program/libfwklo.so +0x166f1ce)
>  #19 in non-virtual thunk to framework::Desktop::loadComponentFromURL(rtl::OUString const&, rtl::OUString const&, int, com::sun::star::uno::Sequence<com::sun::star::beans::PropertyValue> const&) at framework/source/services/desktop.cxx (instdir/program/libfwklo.so +0x166f3da)
>  #20 in unotest::MacrosTest::loadFromDesktop(rtl::OUString const&, rtl::OUString const&, com::sun::star::uno::Sequence<com::sun::star::beans::PropertyValue> const&) at unotest/source/cpp/macros_test.cxx:50:60 (workdir/LinkTarget/CppunitTest/../Library/libunotest.so +0x8f176)
>  #21 in DesktopLOKTest::loadDoc(char const*, LibreOfficeKitDocumentType) at desktop/qa/desktop_lib/test_desktop_lib.cxx:215:19 (workdir/LinkTarget/CppunitTest/libtest_desktop_lib.so +0xf2ca0)
>  #22 in DesktopLOKTest::testGetSignatureState_Signed() at desktop/qa/desktop_lib/test_desktop_lib.cxx:2254:37 (workdir/LinkTarget/CppunitTest/libtest_desktop_lib.so +0x185a42)
[...]

Change-Id: I935f2e37ce6bcb0448f89e75a4f34f78ba54f58d
Reviewed-on: https://gerrit.libreoffice.org/63136
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>