Fix error in gpg signature verification function. Gcrypt is responsible for...

Fix error in gpg signature verification function. Gcrypt is responsible for freeing the value returned by gcry_md_read, so we shouldn't free it ourselves but use gcry_md_close instead.

src/misc/update.c

@@ -1053,17 +1053,17 @@ static vlc_bool_t GetUpdateFile( update_t *p_update )
             != VLC_SUCCESS )
     {
         msg_Err( p_update->p_libvlc, "BAD SIGNATURE for status file" );
-        free( p_hash );
         goto error;
     }
     else
     {
         msg_Info( p_update->p_libvlc, "Status file authenticated" );
-        free( p_hash );
+        gcry_md_close( hd );
         return VLC_TRUE;
     }
 
 error:
+    gcry_md_close( hd );
     if( p_stream )
         stream_Delete( p_stream );
     free( psz_version_line );