Check if the file exists before trying to send a fax.


git-svn-id: http://yate.null.ro/svn/yate/trunk@5644 acf43c95-373e-0410-b603-e72c3f656dc1
Attempt to revert to previous media if our reINVITE was refused.


git-svn-id: http://yate.null.ro/svn/yate/trunk@5645 acf43c95-373e-0410-b603-e72c3f656dc1
Use the proper method to clear saved media parameters.


git-svn-id: http://yate.null.ro/svn/yate/trunk@5646 acf43c95-373e-0410-b603-e72c3f656dc1
Added a revision to the Windows build.


git-svn-id: http://yate.null.ro/svn/yate/trunk@5647 acf43c95-373e-0410-b603-e72c3f656dc1