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[Mutt] #3326: mutt segfaults if a charset is empty in .muttrc



#3326: mutt segfaults if a charset is empty in .muttrc
------------------------------+---------------------------------------------
 Reporter:  antonio@xxxxxxxx  |       Owner:  mutt-dev
     Type:  defect            |      Status:  new     
 Priority:  trivial           |   Milestone:          
Component:  mutt              |     Version:  1.5.20  
 Keywords:  patch             |  
------------------------------+---------------------------------------------
 Related to bug http://bugs.debian.org/537818

 {{{
 To reproduce:
 1) create a .muttrc-minimal that contains a parameter with 'charset' in
 the name and no definition, for example
 set attach_charset=""
 or
 set attach_charset=
 }}}

 This will lead to a segfault, the cause is an improper validation in
 init.c:check_charset, the attached patch fixes the problem

-- 
Ticket URL: <http://dev.mutt.org/trac/ticket/3326>
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