Merged revisions 329995 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/10

................
  r329995 | qwell | 2011-07-28 10:45:49 -0500 (Thu, 28 Jul 2011) | 13 lines
  
  Merged revisions 329994 via svnmerge from 
  https://origsvn.digium.com/svn/asterisk/branches/1.8
  
  ........
    r329994 | qwell | 2011-07-28 10:45:24 -0500 (Thu, 28 Jul 2011) | 6 lines
    
    Fix a SIP transfer deadlock.
    
    The locking in this function is very scary.  There are like 6 structs involved.
    
    (closes issue AST-470)
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@329996 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -23138,8 +23138,6 @@ static int local_attended_transfer(struct sip_pvt *transferer, struct sip_dual *
 		ast_do_masquerade(target.chan1);
-		sip_pvt_lock(transferer); /* the transferer pvt is expected to remain locked on return */
-
 		ast_indicate(target.chan1, AST_CONTROL_UNHOLD);
 		if (target.chan2) {
 			ast_indicate(target.chan2, AST_CONTROL_UNHOLD);
@@ -23180,6 +23178,8 @@ static int local_attended_transfer(struct sip_pvt *transferer, struct sip_dual *
 			ast_channel_queue_connected_line_update(target.chan1, &connected_to_transferee, NULL);
 		}
+		sip_pvt_lock(transferer); /* the transferer pvt is expected to remain locked on return */
+
 		ast_channel_unref(current->chan1);
 	}