enable CMOV_IS_FAST as its faster or equal speed on every cpu (duron, athlon,...

enable CMOV_IS_FAST as its faster or equal speed on every cpu (duron, athlon, PM, P3) from which ive seen benchmarks, it might be slower on P4 but noone has posted benchmarks ...

Originally committed as revision 6652 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/cabac.h

@@ -32,6 +32,7 @@
 #define CABAC_BITS 16
 #define CABAC_MASK ((1<<CABAC_BITS)-1)
 #define BRANCHLESS_CABAC_DECODER 1
+#define CMOV_IS_FAST 1
 
 typedef struct CABACContext{
     int low;