Merge pull request #571 from whitingjp/missing_runtime_error_header

Added missing header for std::runtime_error exception

src/gen/pref_types.cpp

@@ -13,6 +13,7 @@
 #include "gen/pref_types.h"
 
 #include <iostream>
+#include <stdexcept>
 #include <vector>
 
 typedef std::vector<TiXmlElement*> XmlElements;