few bugs fixed thanks to explicit bool constructor and clang.

explicit bool constructor has thus now been removed, as it served it's mission!

modules/visual_script/visual_script_nodes.cpp

@@ -2798,7 +2798,7 @@ public:
 			r_error.error = Variant::CallError::CALL_ERROR_INVALID_METHOD;
 			return 0;
 		}
-		*p_outputs[0] = subcall->call(VisualScriptLanguage::singleton->_subcall, p_inputs, input_args, r_error_str);
+		*p_outputs[0] = subcall->call(VisualScriptLanguage::singleton->_subcall, p_inputs, input_args, r_error);
 		return 0;
 	}
 };