Defer txcount increment until after potential failure
Defer txcount increment until after potential failure

This avoids the txcount incrementing when no transaction actually
occurs.

jjohnson42/confluent,jjohnson42/confluent,jjohnson42/confluent,xcat2/confluent,xcat2/confluent,whowutwut/confluent,whowutwut/confluent,xcat2/confluent,jjohnson42/confluent,xcat2/confluent,whowutwut/confluent,whowutwut/confluent,jjohnson42/confluent,xcat2/confluent