Fix skipping non-constrained enum constraining when inside object of other class (#8075)

Signed-off-by: Kornel Uriasz <[email protected]>

src/V3Randomize.cpp

@@ -5463,6 +5463,8 @@ class RandomizeVisitor final : public VNVisitor {
                               AstEnumDType* const enumDtp
                                   = VN_CAST(subVarp->dtypep()->skipRefToEnump(), EnumDType);
                               if (enumDtp) {
+                                  // Do not emit when enum isn't constrained
+                                  if (!subVarp->user3()) return;
                                   emitEnumConstraint(smtName, enumDtp);
                                   return;
                               }