Add a function so that the compile can proceed.

git-svn-id: https://subversion.assembla.com/svn/qmcdev/trunk@2552 e5b18d87-469d-4833-9cc0-8cdfa06e9491

src/Optimize/VarList.h

@@ -39,6 +39,13 @@ struct VarRegistry: public std::map<std::string,T> {
     }
   }
 
+  //add an function not 
+  inline int addVariable(const std::string& vname, T val)
+  {
+    this->operator[](vname)=val;
+    return this->size();
+  }
+
 };
 #endif
 /***************************************************************************