Description: Fix build with gcc-10.
Author: Jürgen Hötzel <juergen@hoetzel.info>
Origin: https://github.com/nmap/ncrack/pull/83/

--- a/opensshlib/umac.c
+++ b/opensshlib/umac.c
@@ -1181,7 +1181,7 @@
     uhash_ctx hash;          /* Hash function for message compression    */
     pdf_ctx pdf;             /* PDF for hashed output                    */
     void *free_ptr;          /* Address to free this struct via          */
-} umac_ctx;
+};
 
 /* ---------------------------------------------------------------------- */