use info if given an invalid priority

Actually do what the log message says

src/libratbag.c

@@ -132,7 +132,7 @@ ratbag_log_set_priority(struct ratbag *ratbag,
 		log_bug_client(ratbag,
 			       "Invalid log priority %d. Using INFO instead\n",
 			       priority);
-		return;
+		priority = RATBAG_LOG_PRIORITY_INFO;
 	}
 	ratbag->log_priority = priority;
 }