Input metering stops around 90%

[jitsi-jenkins]

On OS X, the input volume meter only goes up to around 90%. This is probably (just guessing) a rounding or arithmetic error. This is confusing because users will have no idea they are distorting their input.

I discussed this on the Jitsi mailing lists and the link to that discussion is: http://lists.jitsi.org/pipermail/dev/2013-July/017867.html

(Issue migrated from https://trac.jitsi.org/ticket/1196)