sha256t.c: make sure unrolled loop is tested.

crypto/sha/sha256t.c

diff --git a/crypto/sha/sha256t.c b/crypto/sha/sha256t.c
index 6b4a3bd..e1d3428 100644
--- a/crypto/sha/sha256t.c
+++ b/crypto/sha/sha256t.c
@@ -82,13 +82,17 @@
 
     EVP_MD_CTX_init (&evp);
     EVP_DigestInit_ex (&evp,EVP_sha256(),NULL);
-    for (i=0;i<1000000;i+=160)
+    for (i=0;i<1000000;i+=288)
 	EVP_DigestUpdate (&evp,	"aaaaaaaa""aaaaaaaa""aaaaaaaa""aaaaaaaa"
 				"aaaaaaaa""aaaaaaaa""aaaaaaaa""aaaaaaaa"
 				"aaaaaaaa""aaaaaaaa""aaaaaaaa""aaaaaaaa"
 				"aaaaaaaa""aaaaaaaa""aaaaaaaa""aaaaaaaa"
+				"aaaaaaaa""aaaaaaaa""aaaaaaaa""aaaaaaaa"
+				"aaaaaaaa""aaaaaaaa""aaaaaaaa""aaaaaaaa"
+				"aaaaaaaa""aaaaaaaa""aaaaaaaa""aaaaaaaa"
+				"aaaaaaaa""aaaaaaaa""aaaaaaaa""aaaaaaaa"
 				"aaaaaaaa""aaaaaaaa""aaaaaaaa""aaaaaaaa",
-				(1000000-i)<160?1000000-i:160);
+				(1000000-i)<288?1000000-i:288);
     EVP_DigestFinal_ex (&evp,md,NULL);
     EVP_MD_CTX_cleanup (&evp);