Nico Coesel <ncoesel@dealogic.nl> fix warnings. . I'm wondering why these

didn't turn up earlier. Is everyone still using gcc 3.x? Or is the x86
version of gcc 4.x much more relaxed?

git-svn-id: svn://svn.berlios.de/openocd/trunk@2749 b42882b7-edfa-0310-969c-e2dbd0fdcd60