fixed secrity issue

git-svn-id: https://plugins.svn.wordpress.org/avchat-3/trunk@833938 b8457f37-d9ea-0310-8a92-e5e31aec5664
new version and tag.
new change log

git-svn-id: https://plugins.svn.wordpress.org/avchat-3/trunk@833941 b8457f37-d9ea-0310-8a92-e5e31aec5664