fix x64 build error (introduced by rebasing)

TEST=compiles

Review URL: http://codereview.chromium.org/6980018

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7833 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/x64/code-stubs-x64.cc

@@ -4580,7 +4580,7 @@ void StringCompareStub::GenerateCompareFlatAsciiStrings(MacroAssembler* masm,
   // Compare lengths (precomputed).
   __ bind(&compare_lengths);
   __ SmiTest(length_difference);
-  __ j(not_zero, &result_not_equal, Label::kNear);
+  __ j(not_zero, &result_not_equal);
 
   // Result is EQUAL.
   __ Move(rax, Smi::FromInt(EQUAL));