irc_callback.diff

diff --git a/irc_callback.go b/irc_callback.go
index fead866..d68f92b 100644
--- a/irc_callback.go
+++ b/irc_callback.go
@@ -31,7 +31,7 @@ func (irc *IRCConnection) ReplaceCallback(eventcode string, i int, callback func
 }
 
 func (irc *IRCConnection) RunCallbacks(event *IRCEvent) {
-       if event.Code == "PRIVMSG" && event.Message[0] == '\x01' {
+       if event.Code == "PRIVMSG" && len(event.Message) > 0 && event.Message[0] == '\x01' {
                event.Code = "CTCP" //Unknown CTCP
                if i := strings.LastIndex(event.Message, "\x01"); i > -1 {
                        event.Message = event.Message[1:i]