Lock the proc around accessing p_siglist in ttycheckoutq() in the unused wait != 0 case.
Lock the proc around accessing p_siglist in ttycheckoutq() in the
unused wait != 0 case.

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase