patch 8.2.3447: a couple of declarations are not ANSI C

Problem:    A couple of declarations are not ANSI C.
Solution:   Put argument type inside (). (Yegappan Lakshmanan, closes #8890)

Author: yegappan

src/os_unix.h

@@ -96,11 +96,11 @@
 #ifdef SIGHASARG
 # ifdef SIGHAS3ARGS
 #  define SIGPROTOARG	(int, int, struct sigcontext *)
-#  define SIGDEFARG(s)	(s, sig2, scont) int s, sig2; struct sigcontext *scont;
+#  define SIGDEFARG(s)	(int s, int sig2, struct sigcontext *scont)
 #  define SIGDUMMYARG	0, 0, (struct sigcontext *)0
 # else
 #  define SIGPROTOARG	(int)
-#  define SIGDEFARG(s)	(s) int s UNUSED;
+#  define SIGDEFARG(s)	(int s UNUSED)
 #  define SIGDUMMYARG	0
 # endif
 #else

src/version.c

@@ -757,6 +757,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3447,
 /**/
     3446,
 /**/