[datatype] fix equals method for udt datatypes across schema upgrades #531
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We encountered a bug with this driver, where an altered UDT would cause
cass_statement_bind_user_type_by_name_n
to fail on a prepared statement that was prepared prior to the db altered.I think that this should be a sensible fix, it for sure fixes our issue... however, I have no idea if this is actually sound!
Unfortunately I do not have a C++ reproducer for this bug, since we use the rust wrapper to this driver, that reproducer is here: https://gist.github.com/jhgg/d009d1fb994a0fd550bd01bb803baee5