Don't build/install game-related documents when building with NOGAMES. This fixes buildworld when src/games doesn't exist (this may not be "officially" supported, but there's no sense in making it harder for somebody that wants to do it).
Don't build/install game-related documents when building with NOGAMES.
This fixes buildworld when src/games doesn't exist (this may not be
"officially" supported, but there's no sense in making it harder for
somebody that wants to do it).

PR:		29162
Submitted by:	Stewart Morgan <stewart@nameless-uk.com>

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