Fix an uninitialized warning from cf594de6.
Fix an uninitialized warning from cf594de6.

The warning was correct, as far as it goes, but the use was
 actually harmless.

youfearm3/opusfile,SmartWalkieOrg/opusfile,xiph/opusfile,youfearm3/opusfile,SmartWalkieOrg/opusfile,gcp/opusfile,xiph/opusfile,SmartWalkieOrg/opusfile,gcp/opusfile,xiph/opusfile,gcp/opusfile