initialize output_value

Author: anutosh491

src/xinterpreter.cpp

@@ -156,7 +156,7 @@ __get_cxx_version ()
         std::string ename;
         std::string evalue;
         //bool compilation_result = false;
-        intptr_t output_value;
+        intptr_t output_value = 0;
         bool hadError = false;
 
         // If silent is set to true, temporarily dismiss all std::cerr and
@@ -245,7 +245,7 @@ __get_cxx_version ()
         {
             // Publish a mime bundle for the last return value if
             // the semicolon was omitted.
-            if (!config.silent && !hadError && trim(blocks.back()).back() != ';') {
+            if (!config.silent && output_value != 0 && trim(blocks.back()).back() != ';') {
                 nl::json pub_data = mime_repr(output_value);
                 publish_execution_result(execution_counter, std::move(pub_data), nl::json::object());
             }