src/thread.c: Don't print uninitialised thread status
src/thread.c: Don't print uninitialised thread status

Depending on the selection flags passed to pdbg not all threads will be
selected. This was leading to random uninitialised values being used to print
thread status for unselected threads. Instead nothing should be printed for
those threads.

Signed-off-by: Alistair Popple <e9adbcf81c8a36ccc628e09bc92d0e25e1c8e501@popple.id.au>
Acked-by: Nicholas Piggin <24829078df5003d9dd1dd871ca2aeb0b1cf95ef4@gmail.com>

open-power/pdbg,open-power/pdbg,open-power/pdbg