lose nls support in mutt when upgrade to gettext-0.15

[Henry Nelson]

With all compile options, libraries, environment variables, etc.
exactly the same as when building with previous versions of gettext,
nls (ja_JP.eucJP) support is lost in Mutt, i.e., messages are in
English instead of Japanese, after upgrading to gettext-0.15.  The
previous version gettext-0.14.6 works fine.  This is tested with a
static build (libintl.a) only.

-- 
henry n.