Fix a file playback crash and explicitly initialize values in func_timeout.c

Fix a file playback crash and explicitly initialize values in func_timeout.c

A crash was brought up on the bugtracker. The first run through valgrind
was full of legitimate complaints of uninitialized values in func_timeout when
setting a response timeout. These were fixed but the crash persisted.

A second run through showed the real problem. The reference counting used
for filestreams was incorrect because there were some missing increments
when a frame was read from a format module.

(closes issue #14118)
Reported by: blitzrage
Patches:
      14118v2.patch uploaded by putnopvut (license 60)
Tested by: blitzrage

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@166267 65c4cc65-6c06-0410-ace0-fbb531ad65f3