Fix rgb15ToUV. Correct order of components and use one shift less.

Originally committed as revision 23279 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale

libswscale/swscale_template.c

@@ -2265,14 +2265,11 @@ static inline void RENAME(rgb15ToUV)(uint8_t *dstU, uint8_t *dstV, uint8_t *src1
         int d0= ((uint32_t*)src1)[i];
 
         int dl= (d0&0x03E07C1F);
-        int dh= ((d0>>5)&0x03E0F81F);
-
-        int dh2= (dh>>11) + (dh<<21);
-        int d= dh2 + dl;
+        int d= dl + (((d0>>16) + (d0<<16))&0x03E07C1F);
 
-        int g= d&0x7F;
-        int r= (d>>10)&0x7F;
-        int b= d>>21;
+        int r= d&0x3F;
+        int b= (d>>10)&0x3F;
+        int g= d>>21;
         dstU[i]= ((RU*r + GU*g + BU*b)>>(RGB2YUV_SHIFT+1-3)) + 128;
         dstV[i]= ((RV*r + GV*g + BV*b)>>(RGB2YUV_SHIFT+1-3)) + 128;
     }