X64: Fix incompatability with previous revision.

test/cctest/test-macro-assembler-x64.cc

Index: test/cctest/test-macro-assembler-x64.cc
diff --git a/test/cctest/test-macro-assembler-x64.cc b/test/cctest/test-macro-assembler-x64.cc
index 071e67a5a10098c12cfdfeda0c9a1a291a0c05b8..27a394642ae49ae21712acccecf0b2ca0f4915ee 100755
--- a/test/cctest/test-macro-assembler-x64.cc
+++ b/test/cctest/test-macro-assembler-x64.cc
@@ -109,7 +109,7 @@ TEST(Smi) {
         CHECK_EQ(smi_from_int, smi_from_intptr);
       }
       int smi_value = smi_from_intptr->value();
-      CHECK_EQ(number, smi_value);
+      CHECK_EQ(number, static_cast<intptr_t>(smi_value));
     }
   }
 }