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

@@ -1088,8 +1088,11 @@ servlist_autojoinedit (ircnet *net, char *channel, gboolean add)
 	else
 	{
 		fav = servlist_favchan_find (net, channel, NULL);
-		servlist_favchan_remove (net, fav);
-		servlist_save ();
+		if (fav)
+		{
+			servlist_favchan_remove (net, fav);
+			servlist_save ();
+		}
 	}
 }