Fix bug with option irc.network.lag_check when value is 0 (zero)

ChangeLog

@@ -21,6 +21,7 @@ Version 0.3.3 (under dev!)
 * irc: add new options irc.network.autoreconnect_delay_growing and
   irc.network.autoreconnect_delay_max (task #10338)
 * irc: add new option weechat.color.status_name_ssl (task #10339)
+* irc: fix bug with option irc.network.lag_check when value is 0 (zero)
 * irc: try other nick when connecting to server and receiving message 437
   (nick unavailable)
 * irc: set buffer local variable "away" when opening new channel (bug #29618)

src/plugins/irc/irc-config.c

@@ -438,6 +438,32 @@ irc_config_change_network_away_check (void *data,
     }
 }
 
+/*
+ * irc_config_change_network_lag_check: called when lag check is changed
+ */
+
+void
+irc_config_change_network_lag_check (void *data,
+                                     struct t_config_option *option)
+{
+    time_t time_next_check;
+    struct t_irc_server *ptr_server;
+    
+    /* make C compiler happy */
+    (void) data;
+    (void) option;
+    
+    time_next_check = (weechat_config_integer (irc_config_network_lag_check) > 0) ?
+        time (NULL) : 0;
+    
+    for (ptr_server = irc_servers; ptr_server;
+         ptr_server = ptr_server->next_server)
+    {
+        if (ptr_server->is_connected)
+            ptr_server->lag_next_check = time_next_check;
+    }
+}
+
 /*
  * irc_config_change_network_send_unknown_commands: called when "send_unknown_commands"
  *                                                  is changed
@@ -1709,7 +1735,8 @@ irc_config_init ()
         "lag_check", "integer",
         N_("interval between two checks for lag (in seconds, 0 = never "
            "check)"),
-        NULL, 0, INT_MAX, "60", NULL, 0, NULL, NULL, NULL, NULL, NULL, NULL);
+        NULL, 0, INT_MAX, "60", NULL, 0, NULL, NULL,
+        &irc_config_change_network_lag_check, NULL, NULL, NULL);
     irc_config_network_lag_min_show = weechat_config_new_option (
         irc_config_file, ptr_section,
         "lag_min_show", "integer",

src/plugins/irc/irc-server.c

@@ -1925,7 +1925,8 @@ irc_server_timer_cb (void *data, int remaining_calls)
                 irc_server_outqueue_send (ptr_server);
                 
                 /* check for lag */
-                if ((ptr_server->lag_check_time.tv_sec == 0)
+                if ((weechat_config_integer (irc_config_network_lag_check) > 0)
+                    && (ptr_server->lag_check_time.tv_sec == 0)
                     && (new_time >= ptr_server->lag_next_check))
                 {
                     irc_server_sendf (ptr_server, 0, "PING %s",