monet5_create_user: don't leak result of mcrypt_BackendSum on error (Coverity)
monet5_create_user: don't leak result of mcrypt_BackendSum on error (Coverity)

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb