Silence GCC warnings:

ibswscale/swscale.c: In function ‘sws_scale’:
libswscale/swscale.c:2678: warning: ‘b’ may be used uninitialized in 
this function
libswscale/swscale.c:2678: warning: ‘g’ may be used uninitialized in 
this function
libswscale/swscale.c:2678: warning: ‘r’ may be used uninitialized in 
this function


git-svn-id: file:///var/local/repositories/mplayer/trunk/libswscale@27837 b3059339-0415-0410-9bf9-f77b7e298cf2

swscale.c

@@ -2734,7 +2734,8 @@ int sws_scale(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
                 r= (i>>3    )*255;
                 g= ((i>>1)&3)*85;
                 b= (i&1     )*255;
-            }else if(c->srcFormat == PIX_FMT_BGR4_BYTE){
+            }else {
+                assert(c->srcFormat == PIX_FMT_BGR4_BYTE);
                 b= (i>>3    )*255;
                 g= ((i>>1)&3)*85;
                 r= (i&1     )*255;