main/postgresql: fix psql segmentation fault

psql segfaults when passing an argument option with a missing argument
patch sent from Quentin Rameau <quinq@fifth.space> fixes it
1 job for !43 with edge-fix-psql-segfault in 27 seconds (queued for 2 seconds)
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docker-alpine x86_64 allowed to fail
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00:00:27

 
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