Fix opmitized external array access for compound assignments

src/ia32/lithium-codegen-ia32.cc

Index: src/ia32/lithium-codegen-ia32.cc
diff --git a/src/ia32/lithium-codegen-ia32.cc b/src/ia32/lithium-codegen-ia32.cc
index 3408256f2d0323a197632f7fbb616d677fbefc87..00a6821f5455d8d78de7187c50b11735ae28fa56 100644
--- a/src/ia32/lithium-codegen-ia32.cc
+++ b/src/ia32/lithium-codegen-ia32.cc
@@ -2311,6 +2311,7 @@ void LCodeGen::DoLoadKeyedSpecializedArrayElement(
         DeoptimizeIf(negative, instr->environment());
         break;
       case kExternalFloatArray:
+      default:

[Mads Ager (chromium), 2011/04/06 16:45:15]

Why do you want a default case here? Isn't it better to not have it so you
realize when you add a new type?

         UNREACHABLE();
         break;
     }
@@ -2980,6 +2981,7 @@ void LCodeGen::DoStoreKeyedSpecializedArrayElement(
         __ mov(Operand(external_pointer, key, times_4, 0), value);
         break;
       case kExternalFloatArray:
+      default:

[Mads Ager (chromium), 2011/04/06 16:45:15]

Ditto.

         UNREACHABLE();
         break;
     }