which is the case with --disabled-nls.
* include/grub/i18n.h: Use (defined(ENABLE_NLS)
&& ENABLE_NLS) instead of ENABLE_NLS in all #if preprocessor macros.
* util/misc.c: Likewise.
* util/mkisofs/mkisofs.c: Likewise.
* util/mkisofs/mkisofs.h: Likewise.