Fix a warning:
server.c:198:11: warning: ignoring return value of ‘scanf’ declared with attribute ‘warn_unused_result’ [-Wunused-result]

--- emacs-18.59/etc/ChangeLog
+++ emacs-18.59/etc/ChangeLog
@@ -1,3 +1,7 @@
+2022-06-27  Ulrich Mueller  <ulm@gentoo.org>
+
+	* server.c (main): Check scanf return value.
+
 2020-08-29  Ulrich Mueller  <ulm@gentoo.org>
 
 	* movemail.c (pfatal_with_name, pfatal_and_delete, get_errmsg):

--- emacs-18.59/etc/server.c
+++ emacs-18.59/etc/server.c
@@ -195,8 +195,8 @@
 	{
 	  /* Read command codeword and fd */
 	  clearerr (stdin);
-	  scanf ("%s %d%*c", code, &infd);
-	  if (ferror (stdin) || feof (stdin))
+	  if (scanf ("%s %d%*c", code, &infd) < 2
+	      || ferror (stdin) || feof (stdin))
 	    {
 	      fprintf (stderr, "server: error reading from standard input\n");
 	      exit (1);