correct_password: do not print "no shadow passwd..." message

function                                             old     new   delta
correct_password                                     204     191     -13
.rodata                                           129530  129466     -64
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(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-77)             Total: -77 bytes
   text    data     bss     dec     hex filename
 675984    2744   13968  692696   a91d8 busybox_old
 675908    2744   13968  692620   a918c busybox_unstripped

1 file changed