minor modification that i needed to compile the code

[gborghesan]

Hello, I needed to compile with the c11 flag, maybe old controller, and make changes; in democpp, fill in the structures where some fields are not initialised. otherwise, I was getting the error

sorry, unimplemented: non-trivial designated initializers not supported

then there is a SCHED_DEADLINE that seems that is not defined anywhere and was preventing to compile the ptrig.c block.