fix infinite recalculation of rich labels that are smaller than their container

Author: pandinocoder

Intersect.Client.Framework/Gwen/Control/RichLabel.cs

@@ -518,6 +518,14 @@ protected override void OnSizeChanged(Point oldSize, Point newSize)
     {
         base.OnSizeChanged(oldSize, newSize);
 
+        if (oldSize.X == newSize.X)
+        {
+            if (newSize.X == _dockFillSize.X && newSize.Y <= _dockFillSize.Y)
+            {
+                return;
+            }
+        }
+
         InvalidateRebuild();
     }