Test WORDS_BIGENDIAN with #if, not #ifdef. Patch by Apple.
Test WORDS_BIGENDIAN with #if, not #ifdef.
Patch by Apple.

--HG--
branch : HEAD

jwm/dovecot-notmuch,jwm/dovecot-notmuch,jkerihuel/dovecot,jwm/dovecot-notmuch,jkerihuel/dovecot,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jkerihuel/dovecot,jkerihuel/dovecot,jkerihuel/dovecot