From 997490223743e3bd40c3cedf5dc799243c6dad9e Mon Sep 17 00:00:00 2001
From: Timothy Pearson <kb9vqf@pearsoncomputing.net>
Date: Sat, 6 Dec 2014 15:08:56 -0600
Subject: [PATCH] Try to avoid crashes if the destructor of a TQMap is called
 when no private object was previously created

---
 src/tools/qmap.h | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/tools/qmap.h b/src/tools/qmap.h
index 4f9772f..a785832 100644
--- a/src/tools/qmap.h
+++ b/src/tools/qmap.h
@@ -644,8 +644,12 @@ public:
 #endif
     ~QMap()
     {
-	if ( sh->deref() )
-	    delete sh;
+	if ( sh ) {
+	    if ( sh->deref() ) {
+		delete sh;
+		sh = 0L;
+	    }
+	}
     }
     QMap<Key,T>& operator= ( const QMap<Key,T>& m );
 #ifndef QT_NO_STL