Remove some unnecessary calls to ast_bridged_channel() in chan_dahdi.c/sig_analog.c

git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@387181 f38db490-d61c-443f-a65b-d21fe96a405b
Remove some unnecessary calls to ast_bridged_channel() in chan_iax2.c

git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@387182 f38db490-d61c-443f-a65b-d21fe96a405b
Remove some unnecessary calls to ast_bridged_channel() in chan_skinny.c

git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@387183 f38db490-d61c-443f-a65b-d21fe96a405b
Remove some unnecessary calls to ast_bridged_channel() in chan_mgcp.c

git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@387184 f38db490-d61c-443f-a65b-d21fe96a405b
Remove some unnecessary calls to ast_bridged_channel() in chan_unistim.c

git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@387185 f38db490-d61c-443f-a65b-d21fe96a405b