# HG changeset patch
# User lost@l-w.ca
# Date 1284914437 21600
# Node ID 652eee8f0c8230bb76ec3f0c77f1f0396279d56a
# Parent  7c0598f69cf331377e9ecd406b66399e00c371fe
Fixed lw_expr_destroy() to not crash on NULL

diff -r 7c0598f69cf3 -r 652eee8f0c82 lwlib/lw_expr.c
--- a/lwlib/lw_expr.c	Fri Aug 13 18:51:12 2010 -0600
+++ b/lwlib/lw_expr.c	Sun Sep 19 10:40:37 2010 -0600
@@ -91,6 +91,8 @@
 void lw_expr_destroy(lw_expr_t E)
 {
 	struct lw_expr_opers *o;
+	if (!E)
+		return;
 	for (o = E -> operands; o; o = o -> next)
 		lw_expr_destroy(o -> p);
 	if (E -> type == lw_expr_type_var)