[PATCH 3/3] sha256/gcrypt: die on gcry_md_open failures

[Eric Wong <e@80x24.org>]

`gcry_md_open' allocates memory and must (like all allocation
functions) be checked for failure.

Signed-off-by: Eric Wong <e@80x24.org>
---
 sha256/gcrypt.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sha256/gcrypt.h b/sha256/gcrypt.h
index 1d06a778af..17a90f1052 100644
--- a/sha256/gcrypt.h
+++ b/sha256/gcrypt.h
@@ -9,7 +9,9 @@ typedef gcry_md_hd_t gcrypt_SHA256_CTX;
 
 static inline void gcrypt_SHA256_Init(gcrypt_SHA256_CTX *ctx)
 {
-	gcry_md_open(ctx, GCRY_MD_SHA256, 0);
+	gcry_error_t err = gcry_md_open(ctx, GCRY_MD_SHA256, 0);
+	if (err)
+		die("gcry_md_open: %s", gcry_strerror(err));
 }
 
 static inline void gcrypt_SHA256_Update(gcrypt_SHA256_CTX *ctx, const void *data, size_t len)