Fixed CBLIS crash due to missing type property
Fixed CBLIS crash due to missing type property

When processing CBL databas change, the changed document doesn't have type property. It's possible that the document was deleted without preserving the type property outside the CBLIS app. Now skipping the document without type property and print out a warning message.

#925

amco/couchbase-lite-ios,amco/couchbase-lite-ios,couchbase/couchbase-lite-ios,amco/couchbase-lite-ios,couchbase/couchbase-lite-ios,brendand/couchbase-lite-ios,couchbase/couchbase-lite-ios,brendand/couchbase-lite-ios,brendand/couchbase-lite-ios,amco/couchbase-lite-ios,amco/couchbase-lite-ios,amco/couchbase-lite-ios,couchbase/couchbase-lite-ios,couchbase/couchbase-lite-ios,amco/couchbase-lite-ios,brendand/couchbase-lite-ios,couchbase/couchbase-lite-ios,brendand/couchbase-lite-ios