Merge pull request #551 from mmp/constfold

Improvements to constant folding.

module.cpp

@@ -1199,7 +1199,7 @@ lEmitEnumDecls(const std::vector<const EnumType *> &enumTypes, FILE *file) {
             const Symbol *e = enumTypes[i]->GetEnumerator(j);
             Assert(e->constValue != NULL);
             unsigned int enumValue;
-            int count = e->constValue->AsUInt32(&enumValue);
+            int count = e->constValue->GetValues(&enumValue);
             Assert(count == 1);
 
             // Always print an initializer to set the value.  We could be