prnat() prnatid(): New, common country name (#number) formatting

prnat() is more convenient when you already got the struct natstr *.

Signed-off-by: Markus Armbruster <armbru@pond.sub.org>

src/lib/subs/natsub.c

@@ -27,7 +27,7 @@
  *  nat.c: Nation subroutines
  *
  *  Known contributors to this file:
- *     Markus Armbruster, 2009-2011
+ *     Markus Armbruster, 2009-2013
  *     Ron Koenderink, 2008-2009
  */
 
@@ -72,3 +72,15 @@ check_nat_name(char *cname, natid cnum)
     }
     return 1;
 }
+
+char *
+prnat(struct natstr *np)
+{
+    return prbuf("%s (#%d)", np->nat_cnam, np->nat_cnum);
+}
+
+char *
+prnatid(natid cnum)
+{
+    return prbuf("%s (#%d)", cname(cnum), cnum);
+}