[net.emacs] Bug fix for 15.34

rms@mit-prep (05/23/85)

From: Richard M. Stallman <rms@mit-prep>
In the function SelfInsert in the file cmds.c, change

  if (abbrev_mode && SYNTAX (c) != Sword
      && !NULL (bf_cur->read_only)
      && dot > FirstCharacter && SYNTAX (CharAt (dot - 1)) == Sword)
to

  if (abbrev_mode && SYNTAX (c) != Sword
      && NULL (bf_cur->read_only)
      && dot > FirstCharacter && SYNTAX (CharAt (dot - 1)) == Sword)