This fixes two of the following warnings on non-x86 machines: libmpcodecs/vf_gradfun.c:388:5: warning: "HAVE_EBX_AVAILABLE" is not defined git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@31025 b3059339-0415-0410-9bf9-f77b7e298cf2