Need to be consistent: rectangle endpoints are within rectangle

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1395 42af7a65-404d-4744-a932-0658087f49c3

graphics/nxglib/nxglib_nullrect.c

@@ -77,6 +77,6 @@
 
 boolean nxgl_nullrect(FAR const struct nxgl_rect_s *rect)
 {
-  return (rect->pt1.x >= rect->pt2.x || rect->pt1.y >= rect->pt2.y);
+  return (rect->pt1.x > rect->pt2.x || rect->pt1.y > rect->pt2.y);
 }