post.c: Remove `pure' attribute from void-returning chkadr().

Spoted by gcc 8.1.1.  Fixes 93a18dd7.

diff --git a/uip/post.c b/uip/post.c
index 09c6615..86c53ae 100644 (file)
--- a/uip/post.c
+++ b/uip/post.c
@@ -318,7 +318,7 @@ static int annoaux (struct mailname *);
 static void insert_fcc (struct headers *, char *);
 static void make_bcc_file (int);
 static void verify_all_addresses (int, int, char *, int, char *);
-static void chkadr (void) PURE;
+static void chkadr (void);
 static void sigon (void);
 static void sigoff (void);
 static void p_refile (char *);