Add stddef include for sortedcache All use of sortedcache will need this header, so put it in the definition of the sortedcache API.
diff --git a/src/sortedcache.h b/src/sortedcache.h
index 5ebb116..4cacad6 100644
--- a/src/sortedcache.h
+++ b/src/sortedcache.h
@@ -14,6 +14,8 @@
#include "pool.h"
#include "strmap.h"
+#include <stddef.h>
+
/*
* The purpose of this data structure is to cache the parsed contents of a
* file (a.k.a. the backing file) where each item in the file can be