Un-break the coff-pe-read.c build

This fixes a build breakage in my recent coff-pe-read.c change.

I'm sorry about this.  I don't understand how it happened, because I
definitely built and tested the series on Windows, and I didn't change
it before pushing.  Something must have gone wrong on the Windows
build, but I don't know what.  I'll investigate and and re-test to be
sure.