Fix issues removing autojoin channels

- Makes remove case insensitive
- Fixes crashing when channel not found

src/common/servlist.c

@@ -842,7 +842,7 @@ servlist_favchan_find (ircnet *net, char *channel, int *pos)
 	while (list)
 	{
 		favchan = list->data;
-		if (strcmp (favchan->name, channel) == 0)
+		if (g_ascii_strcasecmp (favchan->name, channel) == 0)
 		{
 			if (pos)
 			{

src/fe-gtk/servlistgui.c

@@ -1088,10 +1088,13 @@ servlist_autojoinedit (ircnet *net, char *channel, gboolean add)
 	else
 	{
 		fav = servlist_favchan_find (net, channel, NULL);
+		if (fav)
+		{
 			servlist_favchan_remove (net, fav);
 			servlist_save ();
 		}
 	}
+}
 
 static void
 servlist_toggle_global_user (gboolean sensitive)