don't draw darkness unless there are shaped lights

src/hollywoo_flixel/FlxDirector.kiss

@@ -489,13 +489,19 @@
                         (Night NIGHT_COLOR)
                         (otherwise FlxColor.TRANSPARENT)))
     (darkness.makeGraphic FlxG.width FlxG.height darkColor true)
-    (doFor source lightSources (drawLight source))
+    // When there are no shaped light sources, don't draw darkness, it's usually just annoying.
+    (localVar &mut lightIsHere false)
+    (doFor source lightSources
+        (set lightIsHere true)
+        (drawLight source))
     (blackAlphaMaskFlxSprite darkness lightMask darkness)
     (set lightSprite.cameras [flxMovie.screenCamera])
     (set darkness.alpha darkColor.alphaFloat)
     (set darkness.cameras [flxMovie.screenCamera])
-    (FlxG.state.add darkness)
-    (FlxG.state.add lightSprite))
+    // TODO put these in defined sprite layers!
+    (when lightIsHere
+        (FlxG.state.add darkness)
+        (FlxG.state.add lightSprite)))
 
 (method :Void hideLighting []
     (when darkness