[Pidgin] #10906: please provide PurpleConvChat function for total users

[Pidgin]

#10906: please provide PurpleConvChat function for total users
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 Reporter:  jieryn        |     Owner:  rekkanoryo
     Type:  enhancement   |    Status:  new       
Component:  unclassified  |   Version:  2.6.4     
 Keywords:                |  
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 Please have a fast-path accessor for the total number of users in the
 room.

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Ticket URL: <http://developer.pidgin.im/ticket/10906>
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