/* sig-cmp.c */
uns image_signatures_dist(struct image_signature *sig1, struct image_signature *sig2);
-uns image_signatures_dist_explain(struct image_signature *sig1, struct image_signature *sig2, struct fastbuf *fb);
+uns image_signatures_dist_explain(struct image_signature *sig1, struct image_signature *sig2, void (*msg)(byte *text, void *param), void *param);
#endif