Add support for keyed-call on arrays of fast elements

src/lithium.cc

Index: src/lithium.cc
diff --git a/src/lithium.cc b/src/lithium.cc
index fa837c7edef2fbbd23f5f7d9f983bd107b76998c..14aa7629aa22b6c1eb95352c8cdea23bd46da64e 100644
--- a/src/lithium.cc
+++ b/src/lithium.cc
@@ -372,7 +372,8 @@ int LChunk::GetParameterStackSlot(int index) const {
   // shift all parameter indexes down by the number of parameters, and
   // make sure they end up negative so they are distinguishable from
   // spill slots.
-  int result = index - info()->scope()->num_parameters() - 1;
+  int result = index - info()->num_parameters() - 1;
+
   ASSERT(result < 0);
   return result;
 }