Fix deprecation warning.

3396c8a5 · Mike Wey · 7340690c · 3396c8a5
Commit 3396c8a5 authored Apr 05, 2019 by Mike Wey
--- a/demos/gtkD/TestWindow/TestDrawingArea.d
+++ b/demos/gtkD/TestWindow/TestDrawingArea.d
@@ -417,7 +417,7 @@ class TestDrawingArea : VBox

 				context.restore();
 			}
-			delete color;
+			color.destroy();
 		}

 		void onOperatorsChanged(ComboBoxText comboBoxText)