Feature/fix fullinfo error code

[zeyus]

There is an issue with getting a stream fullinfo.

Because EC is not initialized with lsl_no_error the value of ec can be undefined, resulting in checks of ec incorrectly reporting that there was an error ec != 0.

This just adds the same initialization that exists in other functions that use ec

[zeyus]

not sure what happened with the formatting (and teh extra commit that snuck in there!)...I'll fix it later today.

Edit: and done!

[zeyus]

This is just to avoid checking in IDE-related config.
This directory was created locally because I usually have auto-format on, but I have disabled it for liblsl because it made the commits change a bunch of lines in every file I touched with the c++ formatter.