[build,src] Change to error message; update kaldi_lm install script (and kaldi_lm) to fix compile issue (#3581)

Author: danpovey

src/nnet3/nnet-normalize-component.cc

@@ -214,8 +214,8 @@ void BatchNormComponent::ComputeDerived() {
 
   if (count_ == 0.0) {
     KALDI_WARN << "Test-mode is set but there is no data count.  "
-        "Creating random counts.  This only makes sense "
-        "in unit-tests (or compute_prob_*.0.log).  If you see this "
+        "Creating random counts.  This is NOT A PROBLEM if the message "
+        "appears in unit-tests or in compute_prob_*.0.log.  If you see this "
         "elsewhere, something is very wrong.";
     count_ = 1.0;
     stats_sum_.SetRandn();

tools/extras/install_kaldi_lm.sh

@@ -15,8 +15,7 @@ fi
 echo "Installing kaldi_lm"
 
 if [ ! -d "kaldi_lm" ]; then
-  wget http://www.danielpovey.com/files/kaldi/kaldi_lm.tar.gz || exit 1;
-  tar -xvzf kaldi_lm.tar.gz || exit 1;
+  git clone https://github.com/danpovey/kaldi_lm.git || exit 1
 fi
 
 cd kaldi_lm