ofz#6571 catch exception

Change-Id: Ibbc5e7cc24d2125af8d757c8f59121d82ac8ce59
Reviewed-on: https://gerrit.libreoffice.org/50508Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

filter/source/odfflatxml/OdfFlatXml.cxx

@@ -155,6 +155,11 @@ OdfFlatXml::importer(
         SAL_WARN("filter.odfflatxml", exc);
         return false;
     }
+    catch (const std::exception &exc)
+    {
+        SAL_WARN("filter.odfflatxml", exc.what());
+        return false;
+    }
     return true;
 }