Rectify mapping to ASL log level

1. Switch on logFlag rather than logLevel. logFlag varies per log messages,
   while logLevel is constant at file or even global scope.
2. Use the LOG_FLAG_* constants for each case clause.

Lumberjack/DDASLLogger.m

@@ -76,15 +76,15 @@ - (void)logMessage:(DDLogMessage *)logMessage
 		const char *msg = [logMsg UTF8String];
 
 		int aslLogLevel;
-		switch (logMessage->logLevel)
+		switch (logMessage->logFlag)
 		{
 			// Note: By default ASL will filter anything above level 5 (Notice).
 			// So our mappings shouldn't go above that level.
 
-			case 1  : aslLogLevel = ASL_LEVEL_CRIT;    break;
-			case 2  : aslLogLevel = ASL_LEVEL_ERR;     break;
-			case 3  : aslLogLevel = ASL_LEVEL_WARNING; break;
-			default : aslLogLevel = ASL_LEVEL_NOTICE;  break;
+			case LOG_FLAG_ERROR : aslLogLevel = ASL_LEVEL_CRIT;    break;
+			case LOG_FLAG_WARN  : aslLogLevel = ASL_LEVEL_ERR;     break;
+			case LOG_FLAG_INFO  : aslLogLevel = ASL_LEVEL_WARNING; break;
+			default             : aslLogLevel = ASL_LEVEL_NOTICE;  break;
 		}
 
 		asl_log(client, NULL, aslLogLevel, "%s", msg);