ASSERT parameter assumptions in IntEngLineTo()

reactos/subsys/win32k/eng

diff -u -r1.35 -r1.36
--- lineto.c	14 Jul 2004 20:48:57 -0000	1.35
+++ lineto.c	14 Dec 2004 04:30:58 -0000	1.36
@@ -16,7 +16,7 @@

  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  *

- * $Id: lineto.c,v 1.35 2004/07/14 20:48:57 navaraf Exp $

+ * $Id: lineto.c,v 1.36 2004/12/14 04:30:58 royce Exp $

  */
 #include <w32k.h>
 

@@ -491,14 +491,20 @@

 	     MIX mix)
 {
   BOOLEAN ret;

-  SURFOBJ *DestSurf = &DestObj->SurfObj;

+  SURFOBJ *DestSurf;

   PGDIBRUSHINST GdiBrush;
   RECTL b;
 

+  ASSERT(DestObj);
+  DestSurf = &DestObj->SurfObj;
+  ASSERT(DestSurf);
+

   GdiBrush = CONTAINING_RECORD(
      Brush,
      GDIBRUSHINST,
      BrushObject);

+  ASSERT(GdiBrush);
+  ASSERT(GdiBrush->GdiBrushObject);

 
   if (GdiBrush->GdiBrushObject->flAttrs & GDIBRUSH_IS_NULL)
     return TRUE;