From a302590ee0a3f8c30d58c63f83d34e6fc1e1868e Mon Sep 17 00:00:00 2001
From: Pietro Gagliardi <pietro10@mac.com>
Date: Sun, 16 Feb 2014 20:09:51 -0500
Subject: [PATCH] Added crash guard for making alternates (to get editable
 comboboxes).

---
 sysdata_unix.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sysdata_unix.go b/sysdata_unix.go
index b17366a..d1dc323 100644
--- a/sysdata_unix.go
+++ b/sysdata_unix.go
@@ -101,6 +101,10 @@ func (s *sysData) make(initText string, window *sysData) error {
 		println(s.ctype, "not implemented")
 		return nil
 	}
+	if s.alternate && ct.makeAlt == nil {		// not yet implemented
+		println(s.ctype, "alt not implemented")
+		return nil
+	}
 	ret := make(chan *gtkWidget)
 	defer close(ret)
 	uitask <- func() {