From 225446ac996426a7b3dceb7f24b9084cff8c5f00 Mon Sep 17 00:00:00 2001
From: czeidler <haiku@clemens-zeidler.de>
Date: Sat, 1 Sep 2012 16:30:19 +1200
Subject: [PATCH] Check if constraint is NULL.

---
 src/libs/linprog/LinearSpec.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/libs/linprog/LinearSpec.cpp b/src/libs/linprog/LinearSpec.cpp
index cb7137ed65..ac50ef6474 100644
--- a/src/libs/linprog/LinearSpec.cpp
+++ b/src/libs/linprog/LinearSpec.cpp
@@ -288,6 +288,8 @@ bool
 LinearSpec::RemoveConstraint(Constraint* constraint, bool deleteConstraint,
 	bool notifyListener)
 {
+	if (constraint == NULL)
+		return false;
 	fSolver->ConstraintRemoved(constraint);
 	if (!fConstraints.RemoveItem(constraint))
 		return false;