mac-capture: Fix redundant call

plugins/mac-capture/mac-window-capture.m

@@ -32,12 +32,7 @@ static CGImageRef get_image(struct window_capture *wc)
 		kCGWindowListOptionIncludingWindow, wc->window.window_id);
 	[arr autorelease];
 
-	if (arr.count)
-		return CGWindowListCreateImage(
-			CGRectNull, kCGWindowListOptionIncludingWindow,
-			wc->window.window_id, wc->image_option);
-
-	if (!find_window(&wc->window, NULL, false))
+	if (!arr.count && !find_window(&wc->window, NULL, false))
 		return NULL;
 
 	return CGWindowListCreateImage(CGRectNull,