ignore empty input lines

moses-chart-cmd/src/Main.cpp

@@ -89,6 +89,7 @@ public:
 
     VERBOSE(2,"\nTRANSLATING(" << lineNumber << "): " << *m_source);
 
+    if ((*m_source).GetSize() == 0) return;
     ChartManager manager(*m_source, &system);
     manager.ProcessSentence();
 

moses-cmd/src/Main.cpp

@@ -102,6 +102,7 @@ public:
     // execute the translation
     // note: this executes the search, resulting in a search graph
     //       we still need to apply the decision rule (MAP, MBR, ...)
+    if ((*m_source).GetSize() == 0) return;
     Manager manager(*m_source,staticData.GetSearchAlgorithm(), &system);
     manager.ProcessSentence();