X87: fix one patch porting error in R22957.

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/457603002

Patch from Chunyang Dai <chunyang.dai@intel.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22996 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/x87/stub-cache-x87.cc

@@ -583,6 +583,7 @@ void NamedStoreHandlerCompiler::GenerateStoreField(LookupResult* lookup,
     }
     __ j(equal, &do_store, Label::kNear);
   }
+  __ bind(&do_store);
 
   StoreFieldStub stub(isolate(), lookup->GetFieldIndex(),
                       lookup->representation());