Let DxEngScreenAccessCheck() always return true for now until we implemete it

it mean dxg.sys have preemptions to access the screen. 

svn path=/trunk/; revision=33060

reactos/subsystems/win32/win32k/ntddraw/dxeng.c

@@ -656,7 +656,9 @@ DWORD DxEngCreateMemoryDC(DWORD x1)
 DWORD DxEngScreenAccessCheck()
 {
     UNIMPLEMENTED;
-    return FALSE;
+
+    /* we cheating here and tell dxg.sys it have always premitions to access the screen */
+    return TRUE;
 }
 
 /************************************************************************/