make sure testOpenCLCompute() doesn't fail because of a stale lockfile

If the lockfile for the testing .ods stays around, e.g. because of a crash,
the next loading will fail (because no UI interaction is allowed at that
point) and so the whole openCL test will fail.

Change-Id: Ic193003f52e407e47cd634773b6eb4cdefcc2753
Reviewed-on: https://gerrit.libreoffice.org/60497
Tested-by: Jenkins
Reviewed-by: Luboš Luňák <l.lunak@collabora.com>

desktop/source/app/opencl.cxx

@@ -24,6 +24,8 @@
 #include <officecfg/Office/Calc.hxx>
 #include <officecfg/Office/Common.hxx>
 
+#include <svl/documentlockfile.hxx>
+
 #include <com/sun/star/table/XCell2.hpp>
 #include <com/sun/star/sheet/XCalculatable.hpp>
 #include <com/sun/star/sheet/XSpreadsheet.hpp>
@@ -54,6 +56,15 @@ static bool testOpenCLCompute(const Reference< XDesktop2 > &xDesktop, const OUSt
 
     SAL_INFO("opencl", "Starting CL test spreadsheet");
 
+    // A stale lock file would make the loading fail, so make sure to remove it.
+    try {
+        ::svt::DocumentLockFile lockFile( rURL );
+        lockFile.RemoveFileDirectly();
+    }
+    catch (const css::uno::Exception&)
+    {
+    }
+
     try {
         css::uno::Reference< css::frame::XComponentLoader > xLoader(xDesktop, css::uno::UNO_QUERY_THROW);