audio: Fix range on float-to-int data clamping.

I can't tell if there was a good reason for this or it was just me getting
numbers wrong due to exhaustion.

--HG--
extra : rebase_source : 89c4fdec316ae565b004f36050084ba54ad0f8e9
extra : histedit_source : 4951e6c9e873249b9f0baaffd3c9b4b2506308c4
1 file changed