Ability to turn off "no csyms" warning

[empathicqubit]

The csyms error occurs because there are no C files in the project.

will you fix this in next release?

Originally posted by @beamrider66 in #112 (comment)

[beamrider66]

I don't think there need's to be a setting to turn this off. It just shouldn't appear if there are no .c files in the project.