FYI, translate strings in lib/regcomp.c, too

[Jim Meyering]

* POTFILES.in: Also include lib/regcomp.c, since it too uses gettext.

Index: po/POTFILES.in
===================================================================
RCS file: /fetish/cu/po/POTFILES.in,v
retrieving revision 1.26
diff -u -r1.26 POTFILES.in
--- po/POTFILES.in      19 Oct 2006 07:53:42 -0000      1.26
+++ po/POTFILES.in      19 Oct 2006 08:53:17 -0000
@@ -16,6 +16,7 @@
 lib/openat-die.c
 lib/quotearg.c
 lib/randread.c
+lib/regcomp.c
 lib/root-dev-ino.h
 lib/rpmatch.c
 lib/unicodeio.c