From daba69426770b133434ecd187ab8383e5728bb0a Mon Sep 17 00:00:00 2001
From: Richard Graham <richard@rdg.cc>
Date: Sun, 2 Sep 2012 06:25:14 +0000
Subject: [PATCH] Fixed indexerror bug which happened when mouse pointer was
 over a blank region of the operator selector dialog.

---
 .../sf/openrocket/gui/customexpression/OperatorSelector.java    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/src/net/sf/openrocket/gui/customexpression/OperatorSelector.java b/core/src/net/sf/openrocket/gui/customexpression/OperatorSelector.java
index be13514f0..d51af30cc 100644
--- a/core/src/net/sf/openrocket/gui/customexpression/OperatorSelector.java
+++ b/core/src/net/sf/openrocket/gui/customexpression/OperatorSelector.java
@@ -66,7 +66,7 @@ public class OperatorSelector extends JDialog {
 				Point p = e.getPoint();
 				int row = table.rowAtPoint(p);
 				int col = table.columnAtPoint(p);
-				if (col == 1){
+				if (col == 1 && row > -1){
 					String description = String.valueOf(table.getValueAt(row, 1));
 					description = TextUtil.wrap(description, 60);
 					table.setToolTipText(description);