Add ivar for shadow

Headers/AppKit/NSView.h

@@ -54,6 +54,7 @@
 @class NSScrollView;
 @class NSView;
 @class NSWindow;
+@class NSShadow;
 
 typedef NSInteger NSTrackingRectTag;
 typedef NSInteger NSToolTipTag;
@@ -193,6 +194,7 @@ PACKAGE_SCOPE
   NSUInteger _autoresizingMask;
   NSFocusRingType _focusRingType;
   NSRect _autoresizingFrameError;
+  NSShadow *_shadow;
 }
 
 /*
@@ -740,8 +742,6 @@ PACKAGE_SCOPE
  * Core Animation support methods.  More methods will be added here as more are implemented.
  */
 
-@class NSShadow;
-
 @interface NSView (CoreAnimationSupport)
 
 - (NSShadow *) shadow;

Source/NSView.m

@@ -772,6 +772,8 @@ GSSetDragTypes(NSView* obj, NSArray *types)
     }
   TEST_RELEASE(_cursor_rects);
   TEST_RELEASE(_tracking_rects);
+  TEST_RELEASE(_shadow);
+  
   [self unregisterDraggedTypes];
   [self releaseGState];
 
@@ -5490,11 +5492,12 @@ cmpFrame(id view1, id view2, void *context)
 
 - (NSShadow *) shadow
 {
-  return nil;
+  return _shadow;
 }
 
 - (void) setShadow: (NSShadow *)shadow
 {
+  ASSIGN(_shadow, shadow);
 }
 
 @end