Fix crash if content view is removed from window by moving it to another one.

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@23567 72102866-910b-0410-8b05-ffd578937521

ChangeLog

@@ -1,3 +1,9 @@
+2006-09-20 Richard Frith-Macdonald <rfm@gnu.org>
+
+	* Source/GSWindowDecorationView.m: ([removeSubview:]) override to
+	check for removal of the window's content view and handle that
+	case so that the window knows the content view has gone.
+
 2006-09-17  Matt Rice <ratmice@yahoo.com>
 
 	* Source/NSDocument.m (-initWithContentsOfFile:ofType:): Set the

Source/GSWindowDecorationView.m

@@ -123,6 +123,20 @@ struct NSWindow_struct
   return self;
 }
 
+- (void) removeSubview: (NSView*)aView
+{
+  RETAIN(aView);
+  /*
+   * If the content view is removed, we must let the window know.
+   */
+  [super removeSubview: aView];
+  if (aView == [_window contentView])
+    {
+      [_window setContentView: nil];
+    }
+  RELEASE(aView);
+}
+
 - (void) setBackgroundColor: (NSColor *)color
 {
   [self setNeedsDisplayInRect: contentRect];