[Pidgin] #9872: libgnt doesn't remove IO watches on exit

[Pidgin]

#9872: libgnt doesn't remove IO watches on exit
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 Reporter:  desowin              |     Owner:  sadrul
     Type:  defect               |    Status:  new   
Component:  finch (gnt/ncurses)  |   Version:        
 Keywords:                       |  
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 libgnt doesn't remove IO watches on exit.
 As io_invoke() uses static GntWM *wm; this can lead to race condition on
 exit.
 I'm attaching patch fixing this problem.

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Ticket URL: <http://developer.pidgin.im/ticket/9872>
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