Correct api.json information

An attempt to fix issue 1084: https://github.com/fireice-uk/xmr-stak/issues/1084

xmrstak/misc/executor.cpp

@@ -1223,7 +1223,7 @@ void executor::http_json_report(std::string& out)
 		if(i != 0) cn_error.append(1, ',');
 
 		snprintf(buffer, sizeof(buffer), sJsonApiConnectionError,
-			int_port(duration_cast<seconds>(vMineResults[i].time.time_since_epoch()).count()),
+			int_port(duration_cast<seconds>(vSocketLog[i].time.time_since_epoch()).count()),
 			vSocketLog[i].msg.c_str());
 		cn_error.append(buffer);
 	}