Hopefully fix warnings of uninitialized variables.

runtime/vm/intrinsifier_ia32.cc

Index: runtime/vm/intrinsifier_ia32.cc
===================================================================
--- runtime/vm/intrinsifier_ia32.cc	(revision 14051)
+++ runtime/vm/intrinsifier_ia32.cc	(working copy)
@@ -1098,6 +1098,7 @@
       break;
     default:
       UNREACHABLE();
+      hi_true_cond = hi_false_cond = lo_false_cond = OVERFLOW;

[siva, 2012/10/25 00:36:33]

It seems weird to have this initialization code after
the UNREACHABLE() statement, could you do a return false;
instead to keep the compiler happy.

   }
   __ Bind(&try_mint_smi);
   // Note that EDX and ECX must be preserved in case we fall through to main