maint: remove useless casts to avoid "make syntax-check" failures

* gzip.c (do_exit): Remove anachronistic cast.
* inflate.c (huft_free): Likewise.
* util.c (add_envopt): Likewise.
* vms/vms.c (vms_expand_args): Likewise.

1 files changed, 1 insertions, 1 deletions

diff --git a/util.c b/util.c
index f375bf8..1272f56 100644
--- a/util.c
+++ b/util.c
@@ -392,7 +392,7 @@ char *add_envopt(argcp, argvp, env)
     /* Allocate the new argv array, with an extra element just in case
      * the original arg list did not end with a NULL.
      */
-    nargv = (char **) xcalloc (*argcp + 1, sizeof (char *));
+    nargv = xcalloc (*argcp + 1, sizeof (char *));
     oargv  = *argvp;
     *argvp = nargv;