Revert "CLEANUP: Remove unnecessary type conversion."
Revert "CLEANUP: Remove unnecessary type conversion."

This reverts commit f8640a39cc754a21c94b0ea77a406fbd508b2b67.

It was discovered that syscall.Stdin on Windows is not an int
like on other systems, so it must be converted here.

OpenBazaar/openbazaar-go,OpenBazaar/openbazaar-go,gubatron/openbazaar-go,OpenBazaar/openbazaar-go,gubatron/openbazaar-go,gubatron/openbazaar-go