[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:  closed   
Milestone:  2.5.3       |    Component:  libpurple
  Version:  2.5.1       |   Resolution:  fixed    
 Keywords:  circbuffer  |  
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Changes (by datallah at pidgin.im):

  * status:  new => closed
  * resolution:  => fixed
  * milestone:  => 2.5.3


Comment:

 (In [34498a55a9da4fdac121ada82469350d2d67984a]):[[BR]]
 Clean up some unnecessary and unused code in the
 purple_circ_buffer_append()
 function.  Thanks to Ryan Fan for noticing.
 Also avoid calling memcpy for 0 bytes.
 Fixes #7282

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Ticket URL: <http://developer.pidgin.im/ticket/7282#comment:5>
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