Unbreak WARNS=6 builds for C++ code: -Wold-style-definition is not accepted by the C++ compiler. Filter it out.
Unbreak WARNS=6 builds for C++ code: -Wold-style-definition is not accepted
by the C++ compiler. Filter it out.

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