tool_metalink: fix error detection of hash alg initialization

The {MD5,SHA1,SHA256}_Init functions from OpenSSL are called directly
without any wrappers and they return 1 for success, 0 otherwise.  Hence,
we have to use the same approach in all the wrapper functions that are
used for the other crypto libraries.

This commit fixes a regression introduced in commit dca8ae5f.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/tool_metalink.h b/src/tool_metalink.h
index 3cb9461b6..0a69c459e 100644
--- a/src/tool_metalink.h
+++ b/src/tool_metalink.h
@@ -23,7 +23,9 @@
  ***************************************************************************/
 #include "tool_setup.h"
 
+/* returns 1 for success, 0 otherwise (we use OpenSSL *_Init fncs directly) */
 typedef int (* Curl_digest_init_func)(void *context);
+
 typedef void (* Curl_digest_update_func)(void *context,
                                          const unsigned char *data,
                                          unsigned int len);