Index: src/compose.c
===================================================================
RCS file: /pack/anoncvs/sylpheedclaws/sylpheed-claws/src/compose.c,v
retrieving revision 1.382.2.442
diff -u -p -r1.382.2.442 compose.c
--- src/compose.c	2008/03/06 12:56:32	1.382.2.442
+++ src/compose.c	2008/04/03 20:09:21
@@ -9178,7 +9178,8 @@ static void compose_undo_cb(Compose *com
 	gboolean prev_autowrap = compose->autowrap;
 
 	compose->autowrap = FALSE;
-	undo_undo(compose->undostruct);
+	if (compose->undostruct)
+		undo_undo(compose->undostruct);
 	compose->autowrap = prev_autowrap;
 }
 
@@ -9187,7 +9188,8 @@ static void compose_redo_cb(Compose *com
 	gboolean prev_autowrap = compose->autowrap;
 	
 	compose->autowrap = FALSE;
-	undo_redo(compose->undostruct);
+	if (compose->undostruct)
+		undo_redo(compose->undostruct);
 	compose->autowrap = prev_autowrap;
 }