fix for gnulib-tool --update

[Bruno Haible]

Hi,

"gnulib-tool --update" always gave an error message. I committed this fix.


2006-04-29  Bruno Haible  <address@hidden>

        * gnulib-tool: Make --update option actually work.

*** gnulib-20060430/gnulib-tool 2006-04-25 14:01:00.000000000 +0200
--- gnulib-20060430-modified/gnulib-tool        2006-04-30 00:59:13.000000000 
+0200
***************
*** 403,409 ****
        echo "you need to use 'gnulib --import' - at your own risk!" 1>&2
        exit 1
      fi
!     if test -n "$libname" || test -n "$sourcebase" || test -n "$m4base" \
         || test -n "$testsbase" || test -n "$auxdir" || test -n "$inctests" \
         || test -n "$avoidlist" || test -n "$lgpl" || test -n "$macro_prefix"; 
then
        echo "gnulib-tool: invalid options for 'update' mode" 1>&2
--- 403,409 ----
        echo "you need to use 'gnulib --import' - at your own risk!" 1>&2
        exit 1
      fi
!     if test -n "$supplied_libname" || test -n "$sourcebase" || test -n 
"$m4base" \
         || test -n "$testsbase" || test -n "$auxdir" || test -n "$inctests" \
         || test -n "$avoidlist" || test -n "$lgpl" || test -n "$macro_prefix"; 
then
        echo "gnulib-tool: invalid options for 'update' mode" 1>&2