# HG changeset patch
# User Chris Cannam
# Date 1390836392 0
# Node ID 4fb53b23d611b4c5765b543f74292ff4e1a52098
# Parent  5d43ce0eeeb8e4918ce70ddf5ace94e6c41bbdb1
Avoid crashing on empty input

diff -r 5d43ce0eeeb8 -r 4fb53b23d611 SparseHMM.cpp
--- a/SparseHMM.cpp	Fri Jan 24 13:16:49 2014 +0000
+++ b/SparseHMM.cpp	Mon Jan 27 15:26:32 2014 +0000
@@ -30,6 +30,10 @@
 SparseHMM::decodeViterbi(std::vector<vector<double> > obsProb,
                          vector<double> *scale) 
 {
+    if (obsProb.size() < 1) {
+        return vector<int>();
+    }
+
     size_t nState = init.size();
     size_t nFrame = obsProb.size();