Fixes this bug:

    After a ":split" the matchparen highlighting isn't there.

The bug is fixed by installing a WinEnter autocommand.  Additionally, the patch
introduces "windo" into the NoMatchParen and DoMatchParen commands, such that
all windows are updated when matchparen is disabled/enabled.

Created by Martin Toft <mt@martintoft.dk> during Google Summer of Code 2007.


Index: runtime/doc/pi_paren.txt
===================================================================
RCS file: /cvsroot/vim/vim7/runtime/doc/pi_paren.txt,v
retrieving revision 1.14
diff -c -r1.14 pi_paren.txt
*** runtime/doc/pi_paren.txt	12 May 2007 14:23:41 -0000	1.14
--- runtime/doc/pi_paren.txt	8 Aug 2007 14:27:23 -0000
***************
*** 12,19 ****
  You can avoid loading this plugin by setting the "loaded_matchparen" variable: >
  	:let loaded_matchparen = 1
  
! The plugin installs CursorMoved autocommands to redefine the match
! highlighting.
  
  To disable the plugin after it was loaded use this command: >
  
--- 12,19 ----
  You can avoid loading this plugin by setting the "loaded_matchparen" variable: >
  	:let loaded_matchparen = 1
  
! The plugin installs CursorMoved, CursorMovedI and WinEnter autocommands to
! redefine the match highlighting.
  
  To disable the plugin after it was loaded use this command: >
  

Index: runtime/plugin/matchparen.vim
===================================================================
RCS file: /cvsroot/vim/vim7/runtime/plugin/matchparen.vim,v
retrieving revision 1.14
diff -c -r1.14 matchparen.vim
*** runtime/plugin/matchparen.vim	2 Aug 2007 21:00:27 -0000	1.14
--- runtime/plugin/matchparen.vim	8 Aug 2007 14:27:23 -0000
***************
*** 1,6 ****
  " Vim plugin for showing matching parens
  " Maintainer:  Bram Moolenaar <Bram@vim.org>
! " Last Change: 2007 Jul 30
  
  " Exit quickly when:
  " - this plugin was already loaded (or disabled)
--- 1,6 ----
  " Vim plugin for showing matching parens
  " Maintainer:  Bram Moolenaar <Bram@vim.org>
! " Last Change: 2007 Aug 8
  
  " Exit quickly when:
  " - this plugin was already loaded (or disabled)
***************
*** 13,19 ****
  
  augroup matchparen
    " Replace all matchparen autocommands
!   autocmd! CursorMoved,CursorMovedI * call s:Highlight_Matching_Pair()
  augroup END
  
  " Skip the rest if it was already done.
--- 13,19 ----
  
  augroup matchparen
    " Replace all matchparen autocommands
!   autocmd! CursorMoved,CursorMovedI,WinEnter * call s:Highlight_Matching_Pair()
  augroup END
  
  " Skip the rest if it was already done.
***************
*** 126,132 ****
  endfunction
  
  " Define commands that will disable and enable the plugin.
! command! NoMatchParen 3match none | unlet! g:loaded_matchparen | au! matchparen
! command! DoMatchParen runtime plugin/matchparen.vim | doau CursorMoved
  
  let &cpo = cpo_save
--- 126,133 ----
  endfunction
  
  " Define commands that will disable and enable the plugin.
! command! NoMatchParen windo 3match none | unlet! g:loaded_matchparen |
! 	  \ au! matchparen
! command! DoMatchParen runtime plugin/matchparen.vim | windo doau CursorMoved
  
  let &cpo = cpo_save