Create HandleScope before calling GetScriptLineNumber

Otherwise we may crash.

BUG=None
LOG=N
R=alph@chromium.org, hpayer@chromium.org

Review URL: https://codereview.chromium.org/169773002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19437 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/allocation-tracker.cc

@@ -267,6 +267,7 @@ AllocationTracker::UnresolvedLocation::~UnresolvedLocation() {
 
 void AllocationTracker::UnresolvedLocation::Resolve() {
   if (script_.is_null()) return;
+  HandleScope scope(script_->GetIsolate());
   info_->line = GetScriptLineNumber(script_, start_position_);
   info_->column = GetScriptColumnNumber(script_, start_position_);
 }