Fix writing of milliseconds in output file

src/String_Parser.cpp

@@ -131,10 +131,10 @@ int String_Parser::string(std::string &string, data_obs *data) {
 			break;
 		case 'M': {
 			// Get number of characters to write
-			int len = snprintf(c, 1, sel.c_str(), data->get_msec());
+			int len = snprintf(c, 1, sel.c_str(), data->get_msec()/1e6);
 			// Write the milliseconds
 			char buffer[len + 1] = "";
-			snprintf(buffer, len + 1, sel.c_str(), data->get_msec());
+			snprintf(buffer, len + 1, sel.c_str(), data->get_msec()/1e6);
 			os << buffer;
 			break;
 		}