Fix $bits on local struct with chained-interface (#7515) (#7517)

src/V3Param.cpp

@@ -875,6 +875,18 @@ class ParamProcessor final {
                 }
                 return true;
             }
+        } else if (!entry.cloneCellPath.empty()) {
+            // Clone entry has no paramTypep stored; look up the type by name.
+            if (AstParamTypeDType* const ptp
+                = V3LinkDotIfaceCapture::findParamTypeInModule(targetModp, entry.refp->name())) {
+                entry.refp->refDTypep(ptp);
+                entry.refp->dtypep(ptp);
+                for (AstRefDType* const xrefp : entry.extraRefps) {
+                    xrefp->refDTypep(ptp);
+                    xrefp->dtypep(ptp);
+                }
+                return true;
+            }
         }
         return false;
     }