Revert (and fix properly) "Uninitialize the file descriptor."

This reverts commit f514b0e1.

The culprit is that InEC is initialized before Inbound, and Inbound's
initialization happens through a call to openFileForRead. However, the
typical initialization order warnings don't fire; so the behavior was:
Inbound is initialized correctly by openFileForRead; then it's reset to
whatever initializer value (0 originally).

A fix is to move Inbound's decl upfront. I'd still prefer initializing
it to something - and -1 seems like a more appropriate value (it causes
a fail-fast rather than a hang due to trying to read from a
valid-looking but unopen fd).