- remove whitespaces between tags in received XML packets before giving

- remove whitespaces between tags in received XML packets before giving
them to the parser ;
- report Gtalk error messages from a buddy to the console.

This patch makes Asterisk "Google Jingle" (chan_gtalk) implementation
work with Empathy. Note that this is only true for audio streams, not
video.

Thank you to PH for his great help!

(closes issue #12647)
Reported by: PH
Patches:
      trunk-12647-1.diff uploaded by phsultan (license 73)
Tested by: phsultan, PH

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@118020 65c4cc65-6c06-0410-ace0-fbb531ad65f3