Initialize harmony block scoping field in scanner.

BUG=
TEST=

Review URL: http://codereview.chromium.org/7671016

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8955 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/scanner-base.cc

@@ -75,7 +75,8 @@ uc32 Scanner::ScanHexEscape(uc32 c, int length) {
 
 JavaScriptScanner::JavaScriptScanner(UnicodeCache* scanner_contants)
     : Scanner(scanner_contants),
-      octal_pos_(Location::invalid()) { }
+      octal_pos_(Location::invalid()),
+      harmony_block_scoping_(false) { }
 
 
 void JavaScriptScanner::Initialize(UC16CharacterStream* source) {