Bug fix from InfoZIP: fix casts for HMAC computation

lib/gladman-fcrypt/hmac.c

diff --git a/lib/gladman-fcrypt/hmac.c b/lib/gladman-fcrypt/hmac.c
index 3632a99..a57f376 100644
--- a/lib/gladman-fcrypt/hmac.c
+++ b/lib/gladman-fcrypt/hmac.c
@@ -87,7 +87,7 @@
 
         /* xor ipad into key value  */
         for(i = 0; i < (IN_BLOCK_LENGTH >> 2); ++i)
-            ((unsigned long*)cx->key)[i] ^= 0x36363636;
+            ((sha1_32t*)cx->key)[i] ^= 0x36363636;
 
         /* and start hash operation */
         sha1_begin(cx->ctx);
@@ -115,7 +115,7 @@
 
     /* set outer key value using opad and removing ipad */
     for(i = 0; i < (IN_BLOCK_LENGTH >> 2); ++i)
-        ((unsigned long*)cx->key)[i] ^= 0x36363636 ^ 0x5c5c5c5c;
+        ((sha1_32t*)cx->key)[i] ^= 0x36363636 ^ 0x5c5c5c5c;
 
     /* perform the outer hash operation */
     sha1_begin(cx->ctx);