Fix warnings about tautological compares by recent Clang versions.

Fix warnings about tautological compares by recent Clang versions.

This fixes the following Clang warnings:

../../v8/src/ia32/assembler-ia32.cc:1504:24: warning: comparison of constant 16 with expression of type 'v8::internal::Condition' is always true [-Wtautological-constant-out-of-range-compare]
  ASSERT(0 <= cc && cc < 16);
  ~~~~~~~~~~~~~~~~~~~~~^~~~~

../../v8/src/ia32/assembler-ia32.cc:1536:27: warning: comparison of constant 16 with expression of type 'v8::internal::Condition' is always true [-Wtautological-constant-out-of-range-compare]
  ASSERT((0 <= cc) && (cc < 16));
  ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~

BUG=crbug.com/151927

Committed: https://code.google.com/p/v8/source/detail?r=12792

[hans, 2012-10-22 15:42:16]

Hi Ulan, I've got another fix for a Clang warning. Hopefully I managed to upload
correctly this time. Can you take a look?

[ulan, 2012-10-22 15:53:33]

LGTM, the upload is correct. I will land it for you.