From 4e225d86f5c0511c8e7fab42587e54041904d9a9 Mon Sep 17 00:00:00 2001
From: Kenneth Heafield <kenlm@kheafield.com>
Date: Sat, 24 Sep 2011 11:33:22 -0400
Subject: Chris says remnant and oovs should not be null, so stop checking. 
 Also, we were not properly doing ZeroRemaining, sorry.

---
 decoder/ff_klm.cc | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/decoder/ff_klm.cc b/decoder/ff_klm.cc
index 3b2113ad..6d9aca54 100644
--- a/decoder/ff_klm.cc
+++ b/decoder/ff_klm.cc
@@ -92,10 +92,9 @@ class KLanguageModelImpl {
 
  public:
   double LookupWords(const TRule& rule, const vector<const void*>& ant_states, double* oovs, void* remnant) {
-    if (oovs) *oovs = 0;
+    *oovs = 0;
     const vector<WordID>& e = rule.e();
-    lm::ngram::ChartState state;
-    lm::ngram::RuleScore<Model> ruleScore(*ngram_, remnant ? *static_cast<lm::ngram::ChartState*>(remnant) : state);
+    lm::ngram::RuleScore<Model> ruleScore(*ngram_, *static_cast<lm::ngram::ChartState*>(remnant));
     unsigned i = 0;
     if (e.size()) {
       if (e[i] == kCDEC_SOS) {
@@ -115,13 +114,12 @@ class KLanguageModelImpl {
         const WordID cdec_word_or_class = ClassifyWordIfNecessary(e[i]);  // in future,
                                                                           // maybe handle emission
         const lm::WordIndex cur_word = MapWord(cdec_word_or_class); // map to LM's id
-        const bool is_oov = (cur_word == 0);
-        if (is_oov && oovs) (*oovs) += 1.0;
+        if (cur_word == 0) (*oovs) += 1.0;
         ruleScore.Terminal(cur_word);
       }
     }
     double ret = ruleScore.Finish();
-    state.ZeroRemaining();
+    static_cast<lm::ngram::ChartState*>(remnant)->ZeroRemaining();
     return ret;
   }
 
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