irc: don't return pointer to irc server if the channel or nick is not found in info "irc_buffer"

CHANGELOG.md

@@ -31,6 +31,7 @@
 
 ### Fixed
 
+- irc: don't return pointer to irc server if the channel or nick is not found in info "irc_buffer"
 - irc: close /list buffer when the server buffer is closed ([#2121](https://github.com/weechat/weechat/issues/2121))
 - xfer: fix send of data on the DCC chat buffer after `/upgrade` if the buffer was opened before the upgrade ([#2092](https://github.com/weechat/weechat/issues/2092))
 - php: fix return value of function hdata_longlong

src/plugins/irc/irc-info.c

@@ -298,7 +298,11 @@ irc_info_info_irc_buffer_cb (const void *pointer, void *data,
 
     /* search for server or channel buffer */
     if (server && ptr_server && channel)
+    {
         ptr_channel = irc_channel_search (ptr_server, channel);
+        if (!ptr_channel)
+            ptr_server = NULL;
+    }
 
     free (server);
     free (channel);