core: fix write of weechat.log to stdout with weechat-headless --stdout (closes #2247)

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 ### Fixed
 
+- core: fix write of weechat.log to stdout with `weechat-headless --stdout` ([#2247](https://github.com/weechat/weechat/issues/2247))
 - core: add refresh of window title on buffer switch, when option weechat.look.window_title is set
 - core: consider all keys are safe in cursor context ([#2244](https://github.com/weechat/weechat/issues/2244))
 - irc: display nick changes and quit messages when option irc.look.ignore_tag_messages is enabled ([#2241](https://github.com/weechat/weechat/issues/2241))

src/core/core-log.c

@@ -72,21 +72,22 @@ log_open (const char *filename, const char *mode)
     {
         weechat_log_file = stdout;
     }
-    else if (filename)
-    {
-        weechat_log_filename = strdup (filename);
-    }
     else
     {
-        string_asprintf (&weechat_log_filename,
-                         "%s/%s", weechat_state_dir, WEECHAT_LOG_NAME);
+        if (filename)
+        {
+            weechat_log_filename = strdup (filename);
+        }
+        else
+        {
+            string_asprintf (&weechat_log_filename,
+                             "%s/%s", weechat_state_dir, WEECHAT_LOG_NAME);
+        }
+        if (!weechat_log_filename)
+            return 0;
+        weechat_log_file = fopen (weechat_log_filename, mode);
     }
 
-    if (!weechat_log_filename)
-        return 0;
-
-    weechat_log_file = fopen (weechat_log_filename, mode);
-
     if (!weechat_log_file)
     {
         if (weechat_log_filename)