Minor fix

diff --git a/src/GLViewer/GLViewer_Grid.cxx b/src/GLViewer/GLViewer_Grid.cxx
index 56b89494354c3e4b4143f8a4ac146ece8a29cb9a..05c21b49e513a81eb710ad73f31aaf948506ee77 100644 (file)
--- a/src/GLViewer/GLViewer_Grid.cxx
+++ b/src/GLViewer/GLViewer_Grid.cxx
@@ -358,6 +358,10 @@ bool GLViewer_Grid::initList()
   if( myYSize == (GLfloat)0.0 )
       myYSize = (GLfloat)0.1;
 
+  if( myGridWidth == (GLfloat)0.0 ||
+      myGridHeight == (GLfloat)0.0 )
+    return false;
+
 label:
   if( ( myXSize >= myGridWidth / myScaleRatio ) &&
       ( myYSize >= myGridHeight / myScaleRatio ) )