In r16050 LIB_REVISION was bumped, but this is only used to identify newer
implementations when the api hasn't changed. LIB_CURRENT increments for
any actual ABI change, and LIB_AGE is also incremented for backward-
compatible changes like new entry points.

See theora/configure.ac for a handy guide.

svn path=/trunk/ogg/; revision=16053