Replace non-existant log_warning() call by log_error()
Replace non-existant log_warning() call by log_error()

mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs