trap typos

[alms@cambridge.apple.com (Andrew L. M. Shalit)]

Reported by Fry, whose modem is broken:

In the trap files, two sound manager traps have types in their
names:

(_SndDoImmediat . #xA804)  ===>> (_SndDoImmediate . #xA804)
                                                ^

(_SndNewChanne . #xA807)   ===>> (_SndNewChannel . #xA807)
                                               ^
   -andrew