Fixed redundant attempts to load revision of a nonexistent document
Fixed redundant attempts to load revision of a nonexistent document

Loading the revision returns kCBLStatusNotFound (404) which was
preventing the -currentRevision method from setting the
_currentRevisionKnown flag, even though it now knows there is no
current revision.

tomco/couchbase-lite-ios,amco/couchbase-lite-ios,pellekrogholt/couchbase-lite-ios,gotmyjobs/couchbase-lite-ios,amco/couchbase-lite-ios,pellekrogholt/couchbase-lite-ios,tomco/couchbase-lite-ios,amco/couchbase-lite-ios,pellekrogholt/couchbase-lite-ios,alfared/couchbase-lite-ios,couchbase/couchbase-lite-ios,alfared/couchbase-lite-ios,ipmobiletech/couchbase-lite-ios,pellekrogholt/couchbase-lite-ios,amco/couchbase-lite-ios,tomco/couchbase-lite-ios,brendand/couchbase-lite-ios,tomco/couchbase-lite-ios,brendand/couchbase-lite-ios,amco/couchbase-lite-ios,lordkev/couchbase-lite-ios,amco/couchbase-lite-ios,couchbase/couchbase-lite-ios,lordkev/couchbase-lite-ios,brendand/couchbase-lite-ios,alfared/couchbase-lite-ios,gotmyjobs/couchbase-lite-ios,ipmobiletech/couchbase-lite-ios,lordkev/couchbase-lite-ios,ipmobiletech/couchbase-lite-ios,brendand/couchbase-lite-ios,lordkev/couchbase-lite-ios,amco/couchbase-lite-ios,couchbase/couchbase-lite-ios,brendand/couchbase-lite-ios,couchbase/couchbase-lite-ios,gotmyjobs/couchbase-lite-ios,gotmyjobs/couchbase-lite-ios,ipmobiletech/couchbase-lite-ios,alfared/couchbase-lite-ios,couchbase/couchbase-lite-ios,couchbase/couchbase-lite-ios