From 1ef494a6ece4852d51a437c4f008500535343021 Mon Sep 17 00:00:00 2001
From: Chris Dyer <cdyer@cs.cmu.edu>
Date: Wed, 14 Sep 2011 14:43:03 +0100
Subject: fix for potential segv with no weights

---
 pro-train/mr_pro_reduce.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pro-train/mr_pro_reduce.cc b/pro-train/mr_pro_reduce.cc
index e71347ba..6b491918 100644
--- a/pro-train/mr_pro_reduce.cc
+++ b/pro-train/mr_pro_reduce.cc
@@ -100,7 +100,7 @@ double TrainingInference(const vector<weight_t>& x,
                          vector<weight_t>* g = NULL) {
   double cll = 0;
   for (int i = 0; i < corpus.size(); ++i) {
-    const double dotprod = corpus[i].second.dot(x) + x[0]; // x[0] is bias
+    const double dotprod = corpus[i].second.dot(x) + (x.size() ? x[0] : weight_t()); // x[0] is bias
     double lp_false = dotprod;
     double lp_true = -dotprod;
     if (0 < lp_true) {
-- 
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