Type info: fix three bit representation of smi type.

src/type-info.h

Index: src/type-info.h
diff --git a/src/type-info.h b/src/type-info.h
index 9d20bc19df7eb58c2a81904b0370d6caafdc93bb..91ecab8f5b9812cfea8c24b7bbb77bf4b3d183cc 100644
--- a/src/type-info.h
+++ b/src/type-info.h
@@ -79,7 +79,7 @@ class TypeInfo {
 
   // Decode compact representation.  Very sensitive to enum values below!
   static TypeInfo ExpandedRepresentation(int three_bit_representation) {
-    Type t = static_cast<Type>(three_bit_representation >= 6 ?
+    Type t = static_cast<Type>(three_bit_representation > 4 ?
                                three_bit_representation + 2 :
                                three_bit_representation);
     t = (t == kUnknownType) ? t : static_cast<Type>(t | kPrimitiveType);