Index: src/main_act.c
===================================================================
--- src/main_act.c	(revision 15409)
+++ src/main_act.c	(revision 15410)
@@ -272,6 +272,7 @@
 	printf("# Data files loaded\n");
 	for (e = htsp_first(&pcb_file_loaded); e; e = htsp_next(&pcb_file_loaded, e))
 		print_cat(e->value);
+	return 0;
 }
 
 /* --------------------------------------------------------------------------- */