Fix bug in gmm-transform-means, found by Yajie Miao.

git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@1120 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8

src/gmmbin/gmm-transform-means.cc

 // gmmbin/gmm-transform-means.cc
 
 // Copyright 2009-2011  Microsoft Corporation
+//           2012  Johns Hopkins University (author: Daniel Povey)
 
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -86,7 +87,7 @@ int main(int argc, char *argv[]) {
         SubMatrix<BaseFloat> means_part(means_ext, 0, means.NumRows(),
                                         0, means.NumCols());
         means_part.CopyFromMat(means);  // copy old part...
-        new_means.AddMatMat(1.0, means, kNoTrans, mat, kTrans, 0.0);
+        new_means.AddMatMat(1.0, means_ext, kNoTrans, mat, kTrans, 0.0);
       }
       gmm.SetMeans(new_means);
       gmm.ComputeGconsts();