Ensure correct boxing of values when calling functions on them...

src/ia32/fast-codegen-ia32.cc

Index: src/ia32/fast-codegen-ia32.cc
===================================================================
--- src/ia32/fast-codegen-ia32.cc	(revision 3613)
+++ src/ia32/fast-codegen-ia32.cc	(working copy)
@@ -1049,7 +1049,7 @@
   }
   // Record source position for debugger.
   SetSourcePosition(expr->position());
-  CallFunctionStub stub(arg_count, NOT_IN_LOOP);
+  CallFunctionStub stub(arg_count, NOT_IN_LOOP, RECEIVER_MIGHT_BE_VALUE);
   __ CallStub(&stub);
   // Restore context register.
   __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));