Refactored remote changes

commands.c

@@ -474,17 +474,10 @@ bool i_toggle_antialias(arg_t a)
 	}
 }
 
-/* a < 0:  decrease gamma
- * a == 0: reset gamma
- * a > 0:  increase gamma
- */
 bool i_change_gamma(arg_t a)
 {
 	if (mode == MODE_IMAGE) {
-		long val = (long) a;
-		int delta = val > 0 ? 1 : (val < 0 ? -1 : -img.gamma);
-		img_set_gamma(&img, img.gamma + delta);
-		return true;
+		return img_change_gamma(&img, (long) a);
 	} else {
 		return false;
 	}