Correct segenv in pgxc_clean due to argument initialization
Correct segenv in pgxc_clean due to argument initialization

Launching pgxc_clean made it crash when free'ing some fields
with commands where arguments were not all specified.

Patch by Mason Sharp, some reformat by me.

snaga/postgres-xl,zeroae/postgres-xl,arcivanov/postgres-xl,snaga/postgres-xl,yazun/postgres-xl,yazun/postgres-xl,postmind-net/postgres-xl,techdragon/Postgres-XL,pavanvd/postgres-xl,Postgres-XL/Postgres-XL,techdragon/Postgres-XL,arcivanov/postgres-xl,oberstet/postgres-xl,postmind-net/postgres-xl,oberstet/postgres-xl,Postgres-XL/Postgres-XL,ovr/postgres-xl,arcivanov/postgres-xl,snaga/postgres-xl,postmind-net/postgres-xl,kmjungersen/PostgresXL,ovr/postgres-xl,techdragon/Postgres-XL,kmjungersen/PostgresXL,postmind-net/postgres-xl,oberstet/postgres-xl,arcivanov/postgres-xl,Postgres-XL/Postgres-XL,ovr/postgres-xl,arcivanov/postgres-xl,Postgres-XL/Postgres-XL,ovr/postgres-xl,postmind-net/postgres-xl,zeroae/postgres-xl,yazun/postgres-xl,Postgres-XL/Postgres-XL,techdragon/Postgres-XL,ovr/postgres-xl,oberstet/postgres-xl,kmjungersen/PostgresXL,yazun/postgres-xl,pavanvd/postgres-xl,pavanvd/postgres-xl,zeroae/postgres-xl,zeroae/postgres-xl,kmjungersen/PostgresXL,snaga/postgres-xl,kmjungersen/PostgresXL,pavanvd/postgres-xl,techdragon/Postgres-XL,oberstet/postgres-xl,zeroae/postgres-xl,yazun/postgres-xl,arcivanov/postgres-xl,snaga/postgres-xl,pavanvd/postgres-xl