Modified MatchPins so that pin mismatches on nets that are not

connected to anything are once again ignored (the prior commit
to prevent netgen from not reporting swapped pins as an error
overcorrected).

base/netcmp.c

@@ -7350,7 +7350,6 @@ int MatchPins(struct nlist *tc1, struct nlist *tc2, int dolist)
 			Tcl_NewStringObj(ob2->name, -1));
          }
 #endif
-	 result = 0;
 
 	 /* Before making a proxy pin, check to see if	*/
 	 /* flattening instances has left a port with a	*/
@@ -7369,6 +7368,10 @@ int MatchPins(struct nlist *tc1, struct nlist *tc2, int dolist)
 	    needclean2 = 1;
 	    continue;
 	 }
+	 else if (notempty == 1) {
+	    /* Flag this as an error */
+	    result = 0;
+	 }
 	 ob2->model.port = numnodes++;	// Assign a port order
 
 	 /* Add a proxy pin to tc1 */