qpidd --check does not work with info logging and --log-to-stdout=yes

qpidd --check is supposed to print the PID of a running qpidd --daemon, for use in scripts and the like. However with info logging and log-to-stdout enabled this does not work because log messages of the form:
2011-03-14 16:21:05 info Loaded Module: /usr/lib64/qpid/daemon/cluster.so
precede the port number.