From 57c88600155da4deabf85e2fea65c27dff942387 Mon Sep 17 00:00:00 2001
From: klchang <chang87420@126.com>
Date: Mon, 18 Sep 2017 20:01:06 +0800
Subject: [PATCH] fix a runtime bug.

---
 modules/tracking/samples/tutorial_multitracker.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/modules/tracking/samples/tutorial_multitracker.cpp b/modules/tracking/samples/tutorial_multitracker.cpp
index 0c6e9b327..0c6d21800 100644
--- a/modules/tracking/samples/tutorial_multitracker.cpp
+++ b/modules/tracking/samples/tutorial_multitracker.cpp
@@ -62,13 +62,13 @@ int main( int argc, char** argv ){
   //! [selectmulti]
 
   //quit when the tracked object(s) is not provided
-  if(objects.size()<1)
+  if(ROIs.size()<1)
     return 0;
 
   // initialize the tracker
   //! [init]
   std::vector<Ptr<Tracker> > algorithms;
-  for (size_t i = 0; i < objects.size(); i++)
+  for (size_t i = 0; i < ROIs.size(); i++)
   {
       algorithms.push_back(createTrackerByName(trackingAlg));
       objects.push_back(ROIs[i]);