[Bug-tar] 1.15.1 compilation problem on Tru64 (with solution)

[Thomas Koutcher]

There is a problem with file lib/argp-parse.c

Because of the line #define N_(msgid} (msgid), it is not
possible to compile tar 1.15.1 on Tru64.  The macro N_
is defined in several other files with the following variant
#define N_(msgid} msgid [i.e. without () arround msgid] which
doesn't cause any problem.

Please modify lib/argp-parse.c to use the same macro as
other files.

Thanks.