Fix warnings trivial warnings.

Fix warnings about:
 . Unused variables
 . format mismatch in printf/scanf format string and arguments
 . Missing parenthesis around assignment as truth values
 . Clang warnings anout unknown GCC pragma

usr.sbin/mtree/compare.c

@@ -141,7 +141,7 @@ lchown(const char *path, uid_t owner, gid_t group)
 }
 #endif
 
-int
+static int
 utimes(const char *path, const struct timeval times[2])
 {
 	return -1;
@@ -151,7 +151,11 @@ utimes(const char *path, const struct timeval times[2])
 int
 compare(NODE *s, FTSENT *p)
 {
+#if defined(__minix)
+	u_int32_t len, val;
+#else
 	u_int32_t len, val, flags;
+#endif /* defined(__minix) */
 	int fd, label;
 	const char *cp, *tab;
 #if !defined(NO_MD5) || !defined(NO_RMD160) || !defined(NO_SHA1) || !defined(NO_SHA2)

usr.sbin/mtree/create.c

@@ -317,7 +317,9 @@ statd(FTS *t, FTSENT *parent, uid_t *puid, gid_t *pgid, mode_t *pmode,
 	gid_t sgid;
 	uid_t suid;
 	mode_t smode;
+#if !defined(__minix)
 	u_long sflags = 0;
+#endif /* !defined(__minix) */
 	const char *name = NULL;
 	gid_t savegid;
 	uid_t saveuid;

usr.sbin/mtree/verify.c

@@ -168,7 +168,9 @@ miss(NODE *p, char *tail)
 	int create;
 	char *tp;
 	const char *type;
+#if !defined(__minix)
 	u_int32_t flags;
+#endif /* !defined(__minix) */
 
 	for (; p; p = p->next) {
 		if (p->flags & F_OPT && !(p->flags & F_VISIT))