Fixed some Expression and Operand memory issues.

jet-2.0.cpp

@@ -16,7 +16,8 @@ int main(int argc, char **argv) {
       jet::Global global;
       coreutils::MString out;   
       jet::__jet *jet = new jet::__jet(data, out, global); 
-      delete jet;  
+      delete jet;
+      global.dump();
       std::cout << "----------------------" << std::endl;
       global.outputHeaders();
       std::cout << out;