#41 - fix crash on non-string script output in YYC compiler

Author: nickavv

rt-shell/objects/obj_shell/Create_0.gml

@@ -379,9 +379,9 @@ function _execute_script(args, deferred = false) {
 			array_push(history, consoleString);
 			if (response != "") { array_push(output, ">" + consoleString); }
 		}
-		if (response != 0) {
+		if (is_string(response)) {
 			array_push(output, response);
-		}		
+		}
 
 		self._update_positions();
 	} else {