fixed dst inside loop

This fixes examples 08,10 and 11 on iOS.

src/image.cpp

@@ -348,7 +348,7 @@ namespace bgfx
 		const uint8_t* next = src + _srcPitch;
 		uint8_t* dst = (uint8_t*)_dst;
 
-		for (uint32_t yy = 0; yy < _height; ++yy, src = next, next += _srcPitch)
+		for (uint32_t yy = 0; yy < _height; ++yy, src = next, next += _srcPitch, dst += pitch)
 		{
 			memcpy(dst, src, pitch);
 		}