From 2122627877bd8e834ec283c6114c853105a4a502 Mon Sep 17 00:00:00 2001
From: Karl-Heinz Zimmer <khz@kde.org>
Date: Wed, 3 Apr 2013 17:54:29 +0200
Subject: [PATCH] Set ptr to NULL, so this method can be called repeatedly.
 This fixes a crash after unplugging web cam and trying to re-scan the
 cameras.

---
 modules/highgui/src/cap_libv4l.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/modules/highgui/src/cap_libv4l.cpp b/modules/highgui/src/cap_libv4l.cpp
index 63a2ff96b0..ec048aff77 100644
--- a/modules/highgui/src/cap_libv4l.cpp
+++ b/modules/highgui/src/cap_libv4l.cpp
@@ -1714,6 +1714,7 @@ static void icvCloseCAM_V4L( CvCaptureCAM_V4L* capture ){
 #endif
 
      free(capture->deviceName);
+     capture->deviceName = NULL;
      //v4l2_free_ranges(capture);
      //cvFree((void **)capture);
    }