[PATCH] Fix compilation warning

[Bernhard Walle]

This patch fixes following compilation warning:

purgatory/purgatory.c:21: warning: passing argument 2 of 'sha256_update' makes pointer from integer without a cast


Signed-off-by: Bernhard Walle <bwalle at suse.de>

---
 purgatory/purgatory.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/purgatory/purgatory.c
+++ b/purgatory/purgatory.c
@@ -18,7 +18,7 @@ void verify_sha256_digest(void)
 	sha256_starts(&ctx);
 	end = &sha256_regions[sizeof(sha256_regions)/sizeof(sha256_regions[0])];
 	for(ptr = sha256_regions; ptr < end; ptr++) {
-		sha256_update(&ctx, ptr->start, ptr->len);
+		sha256_update(&ctx, (uint8_t *)ptr->start, ptr->len);
 	}
 	sha256_finish(&ctx, digest);
 	if (memcmp(digest, sha256_digest, sizeof(digest)) != 0) {