...as is seen when executing CppunitTest_sd_filters_test with Clang's new
-fsanitize=implicit-conversion (see below).  The next larger natural choice
after short is sal_Int32, and some of the code calling GetAbsLSpace actually
already supported the value to be as wide (but not wider than) sal_Int32; code
calling GetAbsLSpace that expected the value to be no wider than short has
either been adapted or at least been marked with a TODO.  (Other choices could
have been sal_Int64 or long.)

Some dependent function's parameter types have also been changed accordingly.

> Testing file:///home/sbergman/lo/core/sd/qa/unit/data/ppt/pass/hang-10.ppt:
[...]
> filter/source/msfilter/svdfppt.cxx:3792:33: runtime error: implicit conversion from type 'sal_uInt32' (aka 'unsigned int') of value 144780 (32-bit, unsigned) to type 'short' changed the value to 13708 (16-bit, signed)
>  #0 in PPTNumberFormatCreator::ImplGetNumberFormat(SdrPowerPointImport const&, SvxNumberFormat&) at filter/source/msfilter/svdfppt.cxx:3792:33 (instdir/program/libmsfilterlo.so +0x7992cc)
>  #1 in PPTNumberFormatCreator::GetNumberFormat(SdrPowerPointImport const&, SvxNumberFormat&, unsigned int, PPTParaLevel const&, PPTCharLevel const&, TSS_Type) at filter/source/msfilter/svdfppt.cxx:3674:5 (instdir/program/libmsfilterlo.so +0x797c6d)
>  #2 in PPTStyleSheet::PPTStyleSheet(DffRecordHeader const&, SvStream&, SdrPowerPointImport&, PPTTextParagraphStyleAtomInterpreter const&, PPTTextSpecInfo const&) at filter/source/msfilter/svdfppt.cxx:4395:13 (instdir/program/libmsfilterlo.so +0x7ac38d)
>  #3 in SdrPowerPointImport::SdrPowerPointImport(PowerPointImportParam&, rtl::OUString const&) at filter/source/msfilter/svdfppt.cxx:1618:59 (instdir/program/libmsfilterlo.so +0x74762f)
>  #4 in ImplSdPPTImport::ImplSdPPTImport(SdDrawDocument*, SotStorage&, SfxMedium&, PowerPointImportParam&) at sd/source/filter/ppt/pptin.cxx:175:7 (instdir/program/libsdfiltlo.so +0x5f2be8)
>  #5 in SdPPTImport::SdPPTImport(SdDrawDocument*, SvStream&, SotStorage&, SfxMedium&) at sd/source/filter/ppt/pptin.cxx:162:23 (instdir/program/libsdfiltlo.so +0x5ce2bb)
>  #6 in ImportPPT at sd/source/filter/ppt/pptin.cxx:2760:47 (instdir/program/libsdfiltlo.so +0x617c79)
>  #7 in SdPPTFilter::Import() at sd/source/filter/sdpptwrp.cxx:106:32 (instdir/program/libsdlo.so +0x2878413)
>  #8 in sd::DrawDocShell::ConvertFrom(SfxMedium&) at sd/source/ui/docshell/docshel4.cxx:474:46 (instdir/program/libsdlo.so +0x2e165bc)
>  #9 in SfxObjectShell::DoLoad(SfxMedium*) at sfx2/source/doc/objstor.cxx:786:23 (instdir/program/libsfxlo.so +0x2c8cb12)
>  #10 in SdFiltersTest::load(rtl::OUString const&, rtl::OUString const&, rtl::OUString const&, SfxFilterFlags, SotClipboardFormatId, unsigned int) at sd/qa/unit/filters-test.cxx:75:31 (workdir/LinkTarget/CppunitTest/libtest_sd_filters_test.so +0x19771)
>  #11 in test::FiltersTest::recursiveScan(test::filterStatus, rtl::OUString const&, rtl::OUString const&, rtl::OUString const&, SfxFilterFlags, SotClipboardFormatId, unsigned int, bool) at unotest/source/cpp/filters-test.cxx:130:20 (workdir/LinkTarget/CppunitTest/../Library/libunotest.so +0x5724c)
>  #12 in test::FiltersTest::testDir(rtl::OUString const&, rtl::OUString const&, rtl::OUString const&, SfxFilterFlags, SotClipboardFormatId, unsigned int, bool) at unotest/source/cpp/filters-test.cxx:155:5 (workdir/LinkTarget/CppunitTest/../Library/libunotest.so +0x57ec9)
>  #13 in SdFiltersTest::testCVEs() at sd/qa/unit/filters-test.cxx:83:5 (workdir/LinkTarget/CppunitTest/libtest_sd_filters_test.so +0x19d6d)

Change-Id: Ifa298a51bb62b7cbee9249b8289963f3427721f5
Reviewed-on: https://gerrit.libreoffice.org/59116
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>