[Pidgin] #10766: Crash if multiple font styles are enabled

[Pidgin]

#10766: Crash if multiple font styles are enabled
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Reporter:  johannb  |        Type:  defect                                                       
  Status:  new      |   Component:  libpurple                                                    
 Version:  2.5.5    |    Keywords:  font fonts bold italic multiple crash underline strikethrough
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 If I enable several font styles in MSN, Pidgin 2.5.5 crashes.

 I have enabled: Bold, italic, underline and strikethrough.

 Typing messages works but on sending, Pidgin crashes.

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Ticket URL: <http://developer.pidgin.im/ticket/10766>
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