[Pidgin] #15292: [gtk3] Blist resize when minidialog shows up

[Pidgin]

#15292: [gtk3] Blist resize when minidialog shows up
-----------------------------------+----------------------------------------
 Reporter:  salinasv               |     Owner:  QuLogic
     Type:  patch                  |    Status:  new    
Component:  pidgin (gtk)           |   Version:  2.10.6 
 Keywords:  gtk3 minidialog blist  |  
-----------------------------------+----------------------------------------
 Minidialog blist_width_changed_cb() is changing the widget size 4 points
 bigger than the blist. This makes the blist change and thus re-trigger
 this same callback starting a non-stop loop.

 I found that changing this solve the problem.
 {{{
 -((PIDGIN_HIG_BOX_SPACE*3) + 16)
 +((PIDGIN_HIG_BOX_SPACE*3) + 20)
 }}

 The problem is that I don't know what changed by 4 pixels in Gtk3. And I
 don't like that magic numbers. =P

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Ticket URL: <http://developer.pidgin.im/ticket/15292>
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