[Pidgin] #8269: purple-url-handler fails to parse irc://... urls when e.g., ICQ account is present

[Pidgin]

#8269: purple-url-handler fails to parse irc://... urls when e.g., ICQ account is
present
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     Reporter:  Hendrik  |        Type:  patch    
       Status:  new      |   Component:  libpurple
      Version:  2.5.3    |    Keywords:           
Launchpad_bug:           |  
-------------------------+--------------------------------------------------
 The purple-url-handler fails to correctly handle irc://-urls if in the
 list of accounts there is an ICQ account before the account that matches
 the server. In this case, an array out of bounds exception occurs while
 trying to split the the username (there is no "@"-sign in the ICQ-number).

 Also, the IRC-Url handler fails if a port is given inside the url.

 Rudimentary fix for both issues is attached.

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Ticket URL: <http://developer.pidgin.im/ticket/8269>
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