Change type of another md_len variable in pk7_doit.c:PKCS7_dataFinal()

from `int' to `unsigned int' because it's a length and initialized by
EVP_DigestFinal() which expects an `unsigned int *'.

Submitted by: Richard Levitte <levitte@stacken.kth.se>
Reviewed by: Ralf S. Engelschall

CHANGES

@@ -5,6 +5,11 @@
 
  Changes between 0.9.1c and 0.9.2
 
+  *) Change type of another md_len variable in pk7_doit.c:PKCS7_dataFinal()
+     from `int' to `unsigned int' because it's a length and initialized by
+     EVP_DigestFinal() which expects an `unsigned int *'.
+     [Richard Levitte <levitte@stacken.kth.se>]
+
   *) Don't hard-code path to Perl interpreter on shebang line of Configure
      script. Instead use the usual Shell->Perl transition trick.
      [Ralf S. Engelschall]

crypto/pkcs7/pk7_doit.c

@@ -715,7 +715,7 @@ PKCS7_SIGNER_INFO *si;
 	if ((sk != NULL) && (sk_num(sk) != 0))
 		{
 		unsigned char md_dat[EVP_MAX_MD_SIZE];
-		int md_len;
+		unsigned int md_len;
 		ASN1_OCTET_STRING *message_digest;
 
 		EVP_DigestFinal(&mdc_tmp,md_dat,&md_len);