[PATCH] trace-listen: add missing header

[Baruch Siach]

The PATH_MAX macro requires the limits.h header. This fixes build with musl
libc:

.../trace-cmd-trace-cmd-v2.6.1/trace-listen.c: In function âmake_pid_nameâ:
.../trace-cmd-trace-cmd-v2.6.1/trace-listen.c:167:16: error: âPATH_MAXâ undeclared (first use in this function)
  snprintf(buf, PATH_MAX, VAR_RUN_DIR "/trace-cmd-net.pid");
                ^~~~~~~~

Signed-off-by: Baruch Siach <baruch@xxxxxxxxxx>
---
 trace-listen.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/trace-listen.c b/trace-listen.c
index 17ff9d8c160c..838d6bcf3649 100644
--- a/trace-listen.c
+++ b/trace-listen.c
@@ -31,6 +31,7 @@
 #include <fcntl.h>
 #include <signal.h>
 #include <errno.h>
+#include <limits.h>
 
 #include "trace-local.h"
 #include "trace-msg.h"
-- 
2.11.0