Protect older GCCs from -Wno-invalid-source-encoding

Needed for clang, added in r23434

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23475 57a11ea4-9604-0410-9ed3-97b8803252fd
Remove src/gnome-utils/gnc-warnings.c from POTFILES.in

and add it to POTFILES.skip so intltool will stop adding it back.

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23476 57a11ea4-9604-0410-9ed3-97b8803252fd
Bug 708526 - GnuCash Crashes when opening About page

Downgrade the g_error in gnc_filepath_locate_file() to a g_warning
and ensure that all users will properly handle a NULL return value.

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23477 57a11ea4-9604-0410-9ed3-97b8803252fd
Bug 719726 - Click on File -> Open seg-faults

in gnc_uri_get_components in gnucash gnc-uri-utils.c:137

g_strsplit doesn't return a 2-element array if presented with an
empty string.

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23478 57a11ea4-9604-0410-9ed3-97b8803252fd