init_log_streams: check if log_filename is empty.

zhangjunphy · est31 · commit df80b1ae5ae1 · 2015-10-19T12:14:05.000+02:00
Fixes #3262.
diff --git a/src/main.cpp b/src/main.cpp
@@ -540,7 +540,7 @@ static void init_log_streams(const Settings &cmd_args)
 		conf_loglev = lev_name[lev_i];
 	}
 
-	if (conf_loglev.empty())  // No logging
+	if (log_filename.empty() || conf_loglev.empty())  // No logging
 		return;
 
 	LogLevel log_level = Logger::stringToLevel(conf_loglev);

Original file line number	Diff line number	Diff line change
`@@ -540,7 +540,7 @@ static void init_log_streams(const Settings &cmd_args)`
`540`	`540`	`conf_loglev = lev_name[lev_i];`
`541`	`541`	`}`
`542`	`542`
`543`		`- if (conf_loglev.empty()) // No logging`
	`543`	`+ if (log_filename.empty() \|\| conf_loglev.empty()) // No logging`
`544`	`544`	`return;`
`545`	`545`
`546`	`546`	`LogLevel log_level = Logger::stringToLevel(conf_loglev);`