[PATCH] tc: add missing limits.h header

[Baruch Siach]

This fixes under musl build issues like:

f_matchall.c: In function ‘matchall_parse_opt’:
f_matchall.c:48:12: error: ‘LONG_MIN’ undeclared (first use in this function)
   if (h == LONG_MIN || h == LONG_MAX) {
            ^
f_matchall.c:48:12: note: each undeclared identifier is reported only once for 
each function it appears in
f_matchall.c:48:29: error: ‘LONG_MAX’ undeclared (first use in this function)
   if (h == LONG_MIN || h == LONG_MAX) {
                             ^

Signed-off-by: Baruch Siach <bar...@tkos.co.il>
---
 tc/tc_util.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tc/tc_util.h b/tc/tc_util.h
index f198a4ad5554..4db26c6d5e25 100644
--- a/tc/tc_util.h
+++ b/tc/tc_util.h
@@ -2,6 +2,7 @@
 #define _TC_UTIL_H_ 1
 
 #define MAX_MSG 16384
+#include <limits.h>
 #include <linux/pkt_sched.h>
 #include <linux/pkt_cls.h>
 #include <linux/gen_stats.h>
-- 
2.11.0