wb embedded plc, cross reference fix

wb/lib/wb/src/wb_utl.cpp

@@ -11804,13 +11804,33 @@ pwr_tStatus wb_utl::utl_replace_symbol( ldh_tSesContext ldhses,
   case ldh_cPlcFoVolume: {
     pwr_tStatus sts;
     pwr_tOid host;
+    pwr_tCid cid;
 
     sts = ldh_GetParent( ldhses, oid, &host);
     if ( EVEN(sts)) return sts;
     sts = ldh_GetParent( ldhses, host, &host);
     if ( EVEN(sts)) return sts;
 
+    sts = ldh_GetObjectClass( ldhses, host, &cid);
+    if ( EVEN(sts)) return sts;
+
+    if ( cid == pwr_cClass_plc) {      
+      // PlcFo reference in embedded template plc
+      pwr_tAttrRef *host_arp;
+      int size;
+      
+      sts = ldh_GetObjectPar( ldhses, host, "RtBody",
+			      "HostObject", (char **)&host_arp, &size);
+      if ( EVEN(sts)) return sts;
+
+      arp->Objid = host_arp->Objid;
+      arp->Offset += host_arp->Offset;
+
+      free( (char *)host_arp);
+    }
+    else
       arp->Objid = host;
+
     break;
   }
   case ldh_cPlcMainVolume: {