Comment 1 for bug 904647

Packages that use intltool for example to internationalize *.desktop files always build-depend on intltools to create the *.desktop file from a *.desktop.in file. Thus it is impossible to build such a package without intltool.

 The option --disable-nls might suggest that you can disable internationalization, but you cannot disable the use of intltools and thus this option should NOT disable the checks for intltool.

IMO, the option --disable-nls is confusing and should not be added to the configure options by using IT_PROG_INTLTOOL.
(that means remove AM_NLS from intltool.m4 and replace it with just:

if -z $USE_NLS; then USE_NLS=yes;fi
AC_SUBST(USE_NLS)