Convert DEFUNs to standard C.

Convert DEFUNs to standard C.
* src/alloc.c: Convert DEFUNs to standard C.
* src/buffer.c:
* src/bytecode.c:
* src/callint.c:
* src/callproc.c:
* src/casefiddle.c:
* src/casetab.c:
* src/category.c:
* src/character.c:
* src/charset.c:
* src/chartab.c:
* src/cmds.c:
* src/coding.c:
* src/composite.c:
* src/data.c:
* src/dbusbind.c:
* src/dired.c:
* src/dispnew.c:
* src/doc.c:
* src/dosfns.c:
* src/editfns.c:
* src/emacs.c:
* src/eval.c:
* src/fileio.c:
* src/filelock.c:
* src/floatfns.c:
* src/fns.c:
* src/font.c:
* src/fontset.c:
* src/frame.c:
* src/fringe.c:
* src/image.c:
* src/indent.c:
* src/insdel.c:
* src/keyboard.c:
* src/keymap.c:
* src/lread.c:
* src/macros.c:
* src/marker.c:
* src/menu.c:
* src/minibuf.c:
* src/msdos.c:
* src/nsfns.m:
* src/nsmenu.m:
* src/nsselect.m:
* src/print.c:
* src/process.c:
* src/search.c:
* src/sound.c:
* src/syntax.c:
* src/term.c:
* src/terminal.c:
* src/textprop.c:
* src/undo.c:
* src/w16select.c:
* src/w32console.c:
* src/w32fns.c:
* src/w32font.c:
* src/w32menu.c:
* src/w32proc.c:
* src/w32select.c:
* src/window.c:
* src/xdisp.c:
* src/xfaces.c:
* src/xfns.c:
* src/xmenu.c:
* src/xselect.c:
* src/xsettings.c:
* src/xsmfns.c: Likewise.