From: peng xiao <hisenxpress@gmail.com>
Date: Fri, 12 Apr 2013 07:43:33 +0000 (+0800)
Subject: Fix a potential bug of ocl::CannyBuf.
X-Git-Tag: accepted/tizen/6.0/unified/20201030.111113~3919^2~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4f328d8388980604330f0ea1d28ae5734983d648;p=platform%2Fupstream%2Fopencv.git

Fix a potential bug of ocl::CannyBuf.

The program would crash if release is called twice.
---

diff --git a/modules/ocl/src/canny.cpp b/modules/ocl/src/canny.cpp
index 4219af1..e06d299 100644
--- a/modules/ocl/src/canny.cpp
+++ b/modules/ocl/src/canny.cpp
@@ -112,7 +112,11 @@ void cv::ocl::CannyBuf::release()
     mapBuf.release();
     trackBuf1.release();
     trackBuf2.release();
-    openCLFree(counter);
+    if(counter)
+    {
+        openCLFree(counter);
+        counter = NULL;
+    }
 }
 
 namespace cv