[chirp_devel] [PATCH] Fix clone.py to not attempt to read empty ports list.

[Tom Hayward]

Re: http://trac.chirp.danplanet.com/trac/ticket/128 IndexError bug

I said this bug was fixed in changeset:924, but it was actually just
masked. If no ports are found, the IndexError still occurs.

I intended to fix this by displaying an error dialog when no ports
were auto-detected, but decided to fail quietly instead. The user
still has the option to manually type a port location. With this
patch, CHIRP handles an empty serial port list without error. The fix
prevents CHIRP from blindly attempting to read from an empty list.

Tom KD7LXL
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