From 0d60fb40284202029796accc7cffcaa3daf86a85 Mon Sep 17 00:00:00 2001
From: Wyatt Olson <wyatt@digitalcave.ca>
Date: Thu, 4 Nov 2010 17:50:32 -0600
Subject: [PATCH] Fix for issue 298 on behalf of Steve Herrell

---
 rtgui/thumbnail.cc | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/rtgui/thumbnail.cc b/rtgui/thumbnail.cc
index 95b6f5470..3f57b69ac 100644
--- a/rtgui/thumbnail.cc
+++ b/rtgui/thumbnail.cc
@@ -253,15 +253,18 @@ void Thumbnail::increaseRef ()
 
 void Thumbnail::decreaseRef () 
 {
-	Glib::Mutex::Lock lock(mutex);
-	if ( ref != 0 )
 	{
-		--ref;
+		Glib::Mutex::Lock lock(mutex);
 		if ( ref == 0 )
 		{
-			cachemgr->closeThumbnail (this); 
+			return;
+		}
+		if ( --ref != 0 )
+		{
+			return;
 		}
 	}
+	cachemgr->closeThumbnail (this); 
 }
 
 void Thumbnail::getThumbnailSize (int &w, int &h) {