swscale: clear SWS_CPU_CAPS_SSE2 in update_flags_cpu() missed in r32068

Originally committed as revision 32393 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale

libswscale/utils.c

@@ -732,6 +732,7 @@ static int update_flags_cpu(int flags)
     flags &= ~( SWS_CPU_CAPS_MMX
                |SWS_CPU_CAPS_MMX2
                |SWS_CPU_CAPS_3DNOW
+               |SWS_CPU_CAPS_SSE2
                |SWS_CPU_CAPS_ALTIVEC
                |SWS_CPU_CAPS_BFIN);
     flags |= ff_hardcodedcpuflags();