merges r30597 from trunk into ruby_1_9_2.

--
* parse.y: avoid NULL reference.  [ruby-dev:43067]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@30689 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 0 deletions

diff --git a/parse.y b/parse.y
index 7ef894df48..330213ca78 100644
--- a/parse.y
+++ b/parse.y
@@ -8652,6 +8652,7 @@ assign_in_cond(struct parser_params *parser, NODE *node)
 	return 0;
     }
 
+    if (!node->nd_value) return 1;
     switch (nd_type(node->nd_value)) {
       case NODE_LIT:
       case NODE_STR: