hash: fix compiler warning on ARM

* cipher/md.c (md_open, md_copy): Cast 'char *' to ctx through
'void *'.
* cipher/md4.c (md4_final): Use buf_put_* helper instead of
converting 'char *' to 'u32 *'.
* cipher/md5.c (md5_final): Ditto.
* cipher/rmd160.c (_gcry_rmd160_mixblock, rmd160_final): Ditto.
* cipher/sha1.c (sha1_final): Ditto.
* cipher/sha256.c (sha256_final): Ditto.
* cipher/sha512.c (sha512_final): Ditto.
* cipher/tiger.c (tiger_final): Ditto.
--

Patch fixes 'cast increases required alignment' warnings seen on GCC:

md.c: In function 'md_open':
md.c:318:23: warning: cast increases required alignment of target type [-Wcast-align]
       hd->ctx = ctx = (struct gcry_md_context *) ((char *) hd + n);
                       ^
md.c: In function 'md_copy':
md.c:491:22: warning: cast increases required alignment of target type [-Wcast-align]
       bhd->ctx = b = (struct gcry_md_context *) ((char *) bhd + n);
                      ^
md4.c: In function 'md4_final':
md4.c:258:20: warning: cast increases required alignment of target type [-Wcast-align]
 #define X(a) do { *(u32*)p = le_bswap32((*hd).a) ; p += 4; } while(0)
                    ^
md4.c:259:3: note: in expansion of macro 'X'
   X(A);
   ^
md4.c:258:20: warning: cast increases required alignment of target type [-Wcast-align]
 #define X(a) do { *(u32*)p = le_bswap32((*hd).a) ; p += 4; } while(0)
                    ^
md4.c:260:3: note: in expansion of macro 'X'
   X(B);
   ^
[removed the rest]

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>

1 files changed, 2 insertions, 2 deletions

diff --git a/cipher/md.c b/cipher/md.c
index df8b027e..f9414def 100644
--- a/cipher/md.c
+++ b/cipher/md.c
@@ -315,7 +315,7 @@ md_open (gcry_md_hd_t *h, int algo, unsigned int flags)
 
   if (! err)
     {
-      hd->ctx = ctx = (struct gcry_md_context *) ((char *) hd + n);
+      hd->ctx = ctx = (void *) ((char *) hd + n);
       /* Setup the globally visible data (bctl in the diagram).*/
       hd->bufsize = n - sizeof (struct gcry_md_handle) + 1;
       hd->bufpos = 0;
@@ -488,7 +488,7 @@ md_copy (gcry_md_hd_t ahd, gcry_md_hd_t *b_hd)
 
   if (! err)
     {
-      bhd->ctx = b = (struct gcry_md_context *) ((char *) bhd + n);
+      bhd->ctx = b = (void *) ((char *) bhd + n);
       /* No need to copy the buffer due to the write above. */
       gcry_assert (ahd->bufsize == (n - sizeof (struct gcry_md_handle) + 1));
       bhd->bufsize = ahd->bufsize;