title: Opencv push_back function in Mat
body: <p>I`m having serious problem.</p>
  
  <pre><code>class Set 
  { 
    Point_&lt;int&gt; point;    
    int val; 
    double *module; 
  }; 
  
  Mat m;
  Set s;
  m.push_back(s);
  </code></pre>
  
  <p>It says 
  see reference to function template instantiation 'void cv::Mat::push_back(const _Tp &amp;)' being compiled
  When i add  after push_back it brings me:
  see reference to class template instantiation 'cv::Mat_&lt;_Tp>' being compiled</p>