Fix ScopeInfo::StackSlotIndex to skip over non-locals

src/scopeinfo.cc

Index: src/scopeinfo.cc
diff --git a/src/scopeinfo.cc b/src/scopeinfo.cc
index f77ef96ebac4cd8da6bd33f1bd58936a021f354f..c82a6792fc665a755284d0c16753be755aecb74f 100644
--- a/src/scopeinfo.cc
+++ b/src/scopeinfo.cc
@@ -467,11 +467,11 @@ int ScopeInfo::StrongModeFreeVariableEndPosition(int var) {
 }
 
 
-int ScopeInfo::StackSlotIndex(String* name) {
+int ScopeInfo::StackLocalSlotIndex(String* name) {
   DCHECK(name->IsInternalizedString());
   if (length() > 0) {
     int first_slot_index = Smi::cast(get(StackLocalFirstSlotIndex()))->value();
-    int start = StackLocalEntriesIndex();
+    int start = StackLocalEntriesIndex() + first_slot_index;
     int end = StackLocalEntriesIndex() + StackLocalCount();
     for (int i = start; i < end; ++i) {
       if (name == get(i)) {