Screen-out video capture callbacks with no data. Protect against case of no sapi when getting the video device list. Use calloc instead of malloc. Remove some C99-isms. Whitespace.
Screen-out video capture callbacks with no data. Protect against case of no sapi when getting the video device list. Use calloc instead of malloc. Remove some C99-isms. Whitespace.

git-svn-id: 9ed0004971709408f906b8bdafa7f98a7bcab630@1295 f854266a-e20d-0410-a9be-8852184c940f

zlargon/iaxclient,zlargon/iaxclient,zlargon/iaxclient,zlargon/iaxclient,zlargon/iaxclient