add isBE()

git-svn-id: file:///var/local/repositories/mplayer/trunk/libswscale@29212 b3059339-0415-0410-9bf9-f77b7e298cf2

swscale_internal.h

@@ -291,6 +291,7 @@ void ff_yuv2packedX_altivec(SwsContext *c,
 const char *sws_format_name(int format);
 
 //FIXME replace this with something faster
+#define isBE(x) ((x)&1)
 #define isPlanarYUV(x)  (           \
            (x)==PIX_FMT_YUV410P     \
         || (x)==PIX_FMT_YUV420P     \