Records and linksign pragma error

There is a bug in the construction of SACARGunwrapUdt for structs with more than one field. It manifests with a linksign error and is triggered when exporting an imported structure. Consider:

module moda;

export all;

struct A {
  int x;
  double y;
};

This compiles fine and does not provide any SACARGunwrapUdt. Once you compile this module:

module modb;

import moda: all;

export all;

you get:

./modb.sac:3:1: error:
  Pragma 'linksign' illegal: mappings allowed exclusively between parameters without descriptor
  in function SACARGunwrapUdt

in pc:fpc when compiling with 2.0.0-Tintigny-45-g0754b.