fix for a segfault in _gdk_x11_copy_to_image

[Sven Neumann <sven gimp org>]

Hi,

current GTK+-X11 from CVS segfaults if one tries to use
the color picker from the color selection dialog because
the code tries to access a NULL GdkImage pointer. Here's
a patch that seems to fix the problem. OK to commit?


Salut, Sven


Index: gdk/x11/gdkimage-x11.c
===================================================================
RCS file: /cvs/gnome/gtk+/gdk/x11/gdkimage-x11.c,v
retrieving revision 1.39
diff -u -p -r1.39 gdkimage-x11.c
--- gdk/x11/gdkimage-x11.c	2002/01/04 05:58:00	1.39
+++ gdk/x11/gdkimage-x11.c	2002/01/28 11:07:41
@@ -584,8 +584,6 @@ _gdk_x11_copy_to_image (GdkDrawable    *
   if (!gdk_rectangle_intersect (&req, &window_rect, &req))
     goto out;
 
-  private = PRIVATE_DATA (image);
-
   gdk_error_trap_push ();
   
   if (!image &&
@@ -605,6 +603,8 @@ _gdk_x11_copy_to_image (GdkDrawable    *
 					    gdk_drawable_get_depth (drawable));
 	  created_image = TRUE;
 	}
+
+      private = PRIVATE_DATA (image);
 
       /* In the ShmImage but no ShmPixmap case, we could use XShmGetImage when
        * we are getting the entire image.