[Pidgin] #7282: some unnecessary checking in circbuffer implementation

[Pidgin]

#7282: some unnecessary checking in circbuffer implementation
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 Reporter:  rfan.cn     |        Owner:  datallah 
     Type:  defect      |       Status:  new      
Milestone:              |    Component:  libpurple
  Version:  2.5.1       |   Resolution:           
 Keywords:  circbuffer  |  
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Comment(by datallah):

 Why is the function in your paste renamed to `oul_*`?

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Ticket URL: <http://developer.pidgin.im/ticket/7282#comment:2>
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