It turned out that calling log_first_error() is possible w/o
calling log_keep_first_err(), so don't bug_on() on it, just
return NULL.
Reported-by: Adrian Reber <adrian@lisas.de>
Signed-off-by: Pavel Emelyanov <xemul@virtouzzo.com>
Reviewed-by: Adrian Reber <adrian@lisas.de>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>