Merged revisions 74515 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

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r74515 | file | 2007-07-11 11:09:13 -0300 (Wed, 11 Jul 2007) | 2 lines

Only check if we need to do a SIGMA based tone generation if we have a card. (issue #10179 reported by mikowhy)

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@74516 65c4cc65-6c06-0410-ace0-fbb531ad65f3