Corrected an error that was caused by moving the handling of the
"Short"-type device from "extract" to "ext2spice". When running
with "ext2spice extresist on", the "Short" device is read twice.
Since it's being treated like an "equiv" statement, it's very
important to do the node merge only for the device as it appears
in the ".res.ext" file, and ignore the entry in ".ext", or the
wrong nodes may get merged. This appears to be the last major
error lurking in the "extresist" code, as I am now able to run
full R-C extraction on an entire chip, in reasonable time.
83569da8b3