Build breakage Linux/X11 with latest Ben update.

The following build breakage -- something isn't including the right header but, sadly, I couldn't work out where. :) Daniel event-Xt.o: In function `emacs_Xt_compare_magic_event': /usr/src/xemacs/src/event-Xt.c:1876: undefined reference to `WINDOWP' /usr/src/xemacs/src/event-Xt.c:1876: undefined reference to `XWINDOW' /usr/src/xemacs/src/event-Xt.c:1876: undefined reference to `WINDOW_CONSOLE' /usr/src/xemacs/src/event-Xt.c:1876: undefined reference to `WINDOWP' /usr/src/xemacs/src/event-Xt.c:1876: undefined reference to `XWINDOW' /usr/src/xemacs/src/event-Xt.c:1876: undefined reference to `WINDOW_CONSOLE' /usr/src/xemacs/src/event-Xt.c:1880: undefined reference to `WINDOWP' /usr/src/xemacs/src/event-Xt.c:1880: undefined reference to `XWINDOW' /usr/src/xemacs/src/event-Xt.c:1880: undefined reference to `WINDOW_CONSOLE' /usr/src/xemacs/src/event-Xt.c:1880: undefined reference to `WINDOWP' /usr/src/xemacs/src/event-Xt.c:1880: undefined reference to `XWINDOW' /usr/src/xemacs/src/event-Xt.c:1880: undefined reference to `WINDOW_CONSOLE' event-Xt.o: In function `emacs_Xt_format_magic_event': /usr/src/xemacs/src/event-Xt.c:1867: undefined reference to `WINDOWP' /usr/src/xemacs/src/event-Xt.c:1867: undefined reference to `XWINDOW' /usr/src/xemacs/src/event-Xt.c:1867: undefined reference to `WINDOW_CONSOLE' event-Xt.o: In function `emacs_Xt_hash_magic_event': /usr/src/xemacs/src/event-Xt.c:1889: undefined reference to `WINDOWP' /usr/src/xemacs/src/event-Xt.c:1889: undefined reference to `XWINDOW' /usr/src/xemacs/src/event-Xt.c:1889: undefined reference to `WINDOW_CONSOLE' collect2: ld returned 1 exit status -- The problem with defending the purity of the English language is that English is about as pure as a cribhouse whore. We don't just borrow words; on occasion, English has pursued other languages down alleyways to beat them unconscious and rifle their pockets for new vocabulary. -- James D. Nicoll