Fix upgrading of PostgreSQL 9.6
In PostgreSQL 9.6, PG_VERSION is 9.6, so coercing the string data to
an integer would cause the detection of the 9.6 binaries to fail.
Edited by Stan Hu
In PostgreSQL 9.6, PG_VERSION is 9.6, so coercing the string data to
an integer would cause the detection of the 9.6 binaries to fail.