warnings cleanup: Wsign-compare: log_format: int32_t -> size_t
warnings cleanup: Wsign-compare: log_format: int32_t -> size_t

When at it, also fix the related indentation.

Signed-off-by: Jan Pokorný <f06ec55ecfb6704a26166905f43ade3ead1f75d3@redhat.com>

kgaillot/libqb,ClusterLabs/libqb,kgaillot/libqb,ClusterLabs/libqb,kgaillot/libqb,ClusterLabs/libqb