Missing parameter of option() command in cmake file

[mjopenglsdl]

https://github.com/boldtempleGaming/Engine/blob/8ed73a49777b59f0af1031d9787c7bdaa98ba3cb/CMakeLists.txt#L16

The command option(USE_LUA ON) would have no effect to the default value (ON), use option(USE_LUA "some descriptions" ON) instead

Plz take a look at cmake manual: https://cmake.org/cmake/help/v3.0/command/option.html