# HG changeset patch
# User bsmith@81767d24-ef19-dc11-ae90-00e081727c95
# Date 1301595041 0
# Node ID c27ce204302b2aa463471c21ddb70f565b0d1b66
# Parent  bb582f89007a1181630bac2f6681b382cab4e9ca
Add safety check to avoid potential divide by zero.

diff -r bb582f89007a -r c27ce204302b mac/dw.m
--- a/mac/dw.m	Thu Mar 31 18:05:42 2011 +0000
+++ b/mac/dw.m	Thu Mar 31 18:10:41 2011 +0000
@@ -5090,7 +5090,15 @@
     NSScroller *scrollbar = [sv verticalScroller];
     int rowcount = [cont rowCount];
     float currpos = [scrollbar floatValue];
-    float change = (float)rows/(float)rowcount;
+    float change; 
+    
+    /* Safety check */
+    if(rowcount < 1)
+    {
+        return;
+    }
+    
+    change = (float)rows/(float)rowcount;
     
     switch(direction)
     {