Include limits.h because of PATH_MAX usage. (#498)

Fixes build with musl libc on Alpine Linux.

diff --git a/example/passthrough_hp.cc b/example/passthrough_hp.cc
index 974551ea45539ab760c02804ad1fe8b65966617e..61ab68562116231ed4a3bf1518e15c9786f91588 100644 (file)
--- a/example/passthrough_hp.cc
+++ b/example/passthrough_hp.cc
@@ -67,6 +67,7 @@
 #include <time.h>
 #include <unistd.h>
 #include <pthread.h>
+#include <limits.h>
 
 // C++ includes
 #include <cstddef>