const uint8_t r = c >> 16 & 0xff;
const uint8_t g = c >> 8 & 0xff;
const uint8_t b = c & 0xff;
+ uint32_t dstc;
const int dstx = color_get(s, c, a, r, g, b, search_method);
- const uint32_t dstc = s->palette[dstx];
+ if (dstx < 0)
+ return dstx;
+ dstc = s->palette[dstx];
*er = r - (dstc >> 16 & 0xff);
*eg = g - (dstc >> 8 & 0xff);
*eb = b - (dstc & 0xff);