Update colorwheel from GRB to RGB.

Author: kattni

shared-bindings/_pixelbuf/__init__.c

@@ -69,10 +69,10 @@ const int32_t colorwheel(float pos) {
         pos = pos - ((uint32_t)(pos / 256) * 256);
     }
     if (pos < 85)
-        return (uint8_t)(pos * 3) << 16 | (uint8_t)(255 - (pos * 3)) << 8;
+        return (uint8_t)(255 - (pos * 3)) << 16 | (uint8_t)(pos * 3);
     else if (pos < 170) {
         pos -= 85;
-        return (uint8_t)(255 - (pos * 3)) << 16 | (uint8_t)(pos * 3);
+        return (uint8_t)(pos * 3) << 16 | (uint8_t)(255 - (pos * 3)) << 8;
     } else {
         pos -= 170;
         return (uint8_t)(pos * 3) << 8 | (uint8_t)(255 - pos * 3);