Add `const's that I forgot to commit.  Not bad - I broke the -stable and -current builds in the space of 1 day !
Add `const's that I forgot to commit.  Not bad - I broke
the -stable and -current builds in the space of 1 day !

Pointed out by: jdp

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