[Pidgin] #1344: fix for some build warnings

[Pidgin]

#1344: fix for some build warnings
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  Reporter:  o_sukhodolsky  |       Owner:  rlaager
      Type:  patch          |      Status:  closed 
  Priority:  minor          |   Milestone:  2.4.0  
 Component:  pidgin (gtk)   |     Version:  2.0.1  
Resolution:  fixed          |    Keywords:         
   Pending:  0              |  
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Comment (by markdoliner at pidgin.im):

 (In [18490886e6ced71f873dabe23516c5d3d16f0b29]) More compiler warning
 fixes from o_sukhodolsky (with additions by me).
 Fixes #4643, references #1344.

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Ticket URL: <http://developer.pidgin.im/ticket/1344#comment:71>
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