mdadm: Fix building errors In util.c, there is a building error: '/md/metadata_version' directive writing 20 bytes into a region of size between 0 and 255 [-Werror=format-overflow=] In mapfile.c It declares the fouth argument as 'int *' in map_update, but in mdadm.h it's previously declared as an array 'int[4]' Signed-off-by: Xiao Ni <xni@redhat.com> Signed-off-by: Jes Sorensen <jsorensen@fb.com>