[Pidgin] #8425: Fix finch build warnings

[Pidgin]

#8425: Fix finch build warnings
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 Reporter:  darkrain42           |           Owner:  sadrul
     Type:  patch                |          Status:  new   
Component:  finch (gnt/ncurses)  |         Version:  2.5.4 
 Keywords:                       |   Launchpad_bug:        
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 Fix a few build warnings with finch on x64

 Patch attached.

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Ticket URL: <http://developer.pidgin.im/ticket/8425>
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