Improve crash message for attempting to access a destroyed graphic (#3417)

Author: VioletSnowLeopard

flixel/FlxCamera.hx

@@ -608,7 +608,7 @@ class FlxCamera extends FlxBasic
 
 		// TODO: catch this error when the dev actually messes up, not in the draw phase
 		if (graphic.isDestroyed)
-			throw 'Attempted to queue an invalid FlxDrawItem, did you destroy a cached sprite?';
+			throw 'Cannot queue ${graphic.key}. This sprite was destroyed.';
 
 		itemToReturn.graphics = graphic;
 		itemToReturn.antialiasing = smooth;