* alloc.c: Do not define struct catchtag.

* alloc.c: Do not define struct catchtag.
* eval.c: Move struct catchtag definition ...
* lisp.h: ... here.

* image.c: Move png.h #include earlier to avoid warnings.

* xterm.c:
* xsmfns.c:
* xselect.c:
* xrdb.c:
* xmenu.c:
* xftfont.c:
* xfont.c:
* xfns.c:
* xfaces.c:
* xdisp.c:
* window.c:
* widget.c:
* w32xfns.c:
* w32uniscribe.c:
* w32term.c:
* w32select.c:
* w32reg.c:
* w32proc.c:
* w32menu.c:
* w32inevt.c:
* w32heap.c:
* w32font.c:
* w32fns.c:
* w32console.c:
* w32.c:
* w16select.c:
* vm-limit.c:
* unexsol.c:
* unexec.c:
* unexcw.c:
* unexaix.c:
* undo.c:
* tparam.c:
* textprop.c:
* terminfo.c:
* terminal.c:
* termcap.c:
* term.c:
* syntax.c:
* sound.c:
* sheap.c:
* search.c:
* scroll.c:
* region-cache.c:
* regex.c:
* ralloc.c:
* process.c:
* print.c:
* msdos.c:
* minibuf.c:
* menu.c:
* marker.c:
* macros.c:
* keymap.c:
* keyboard.c:
* intervals.c:
* insdel.c:
* indent.c:
* gtkutil.c:
* ftxfont.c:
* ftfont.c:
* fringe.c:
* frame.c:
* fontset.c:
* font.c:
* fns.c:
* floatfns.c:
* filelock.c:
* fileio.c:
* emacs.c:
* editfns.c:
* dosfns.c:
* doprnt.c:
* doc.c:
* dispnew.c:
* dired.c:
* dbusbind.c:
* data.c:
* composite.c:
* coding.c:
* cmds.c:
* cm.c:
* chartab.c:
* charset.c:
* character.c:
* ccl.c:
* category.c:
* casetab.c:
* casefiddle.c:
* callproc.c:
* callint.c:
* bytecode.c:
* buffer.c:
* atimer.c: Include setjmp.h.  (Bug#4643)

* xlwmenu.c:
* lwlib.c:
* lwlib-utils.c:
* lwlib-Xm.c:
* lwlib-Xlw.c:
* lwlib-Xaw.c: Include setjmp.h.