revert the revert

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4711 43c1dc8c-776e-4df2-8ef1-6e829299be21
Fix videoformat2str compile warning

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4712 43c1dc8c-776e-4df2-8ef1-6e829299be21
Check existance of pbx_channel before running pbx_check_hangup (reported by Leonid)

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4713 43c1dc8c-776e-4df2-8ef1-6e829299be21
finish: revert the revert of void sccp_dev_speed_find_byindex

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4714 43c1dc8c-776e-4df2-8ef1-6e829299be21
use boolean indicator in sccp_dev_speed_find_byindex

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4715 43c1dc8c-776e-4df2-8ef1-6e829299be21
remove comment

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4716 43c1dc8c-776e-4df2-8ef1-6e829299be21