libmpcodecs/vf_sab: update to latest version from mplayer

Please see mplayer svn for authorship and individual commits
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavfilter/libmpcodecs/vf_sab.c

@@ -32,6 +32,7 @@
 #endif
 
 #include "libavutil/avutil.h"
+#include "libavutil/mem.h"
 #include "img_format.h"
 #include "mp_image.h"
 #include "vf.h"