randomconfig fixes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/util-linux/mkfs_vfat.c b/util-linux/mkfs_vfat.c
index 26a9195..92f0e3b 100644
--- a/util-linux/mkfs_vfat.c
+++ b/util-linux/mkfs_vfat.c
@@ -522,7 +522,7 @@
 		//STORE_LE(boot_blk->reserved2[3], 0,0,0);
 		STORE_LE(boot_blk->vi.ext_boot_sign, 0x29);
 		STORE_LE(boot_blk->vi.volume_id32, volume_id);
-		strncpy(boot_blk->vi.fs_type, "FAT32   ", sizeof(boot_blk->vi.fs_type));
+		memcpy(boot_blk->vi.fs_type, "FAT32   ", sizeof(boot_blk->vi.fs_type));
 		strncpy(boot_blk->vi.volume_label, volume_label, sizeof(boot_blk->vi.volume_label));
 		memcpy(boot_blk->boot_code, boot_code, sizeof(boot_code));
 		STORE_LE(boot_blk->boot_sign, BOOT_SIGN);