Hi Benedikt,
After looking at the commit in wine master, I noticed some of the functions of the patch didn't make it, namely:
_o__wsetlocale _o_atoi _o_ceil _o_floor
You didn’t send changes for these functions to ucrtbase spec file. Forwards to stubs are removed by make_specfiles script, I guess this is why it was removed from the api-ms-win-crt-private-l1-1-0 spec file.
Please send a new patch that contains changes for these functions.
Thanks, Piotr