Hash is 32 bytes (64 nibbles)

main.c

@@ -2003,7 +2003,7 @@ bool regeneratehash(const struct work *work)
 	uint32_t *data32 = (uint32_t *)(work->data);
 	unsigned char swap[128];
 	uint32_t *swap32 = (uint32_t *)swap;
-	unsigned char hash1[64];
+	unsigned char hash1[32];
 	uint32_t *hash32 = (uint32_t *)(work->hash);
 	uint32_t difficulty = 0;
 	uint32_t diffbytes = 0;
@@ -2016,7 +2016,7 @@ bool regeneratehash(const struct work *work)
 		swap32[i] = swab32(data32[i]);
 
 	sha2(swap, 80, hash1, false);
-	sha2(hash1, 64, (unsigned char *)(work->hash), false);
+	sha2(hash1, 32, (unsigned char *)(work->hash), false);
 
 	difficulty = swab32(*((uint32_t *)(work->data + 72)));