Mark variation-specific interleaveBytes static.

These functions are never called by themselves, the alias
interleaveBytes is used instead.

Originally committed as revision 27735 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale

libswscale/rgb2rgb_template.c

@@ -2429,7 +2429,7 @@ static inline void RENAME(rgb24toyv12)(const uint8_t *src, uint8_t *ydst, uint8_
     }
 }
 
-void RENAME(interleaveBytes)(uint8_t *src1, uint8_t *src2, uint8_t *dest,
+static void RENAME(interleaveBytes)(uint8_t *src1, uint8_t *src2, uint8_t *dest,
                              long width, long height, long src1Stride,
                              long src2Stride, long dstStride){
     long h;