do same with stddef.h

diff --git a/lib/sfio/sfhdr.h b/lib/sfio/sfhdr.h
index d63a5f34ae53a9e6d74d266929196762f9867eda..ad371f7aafab9ea886aa097b609a273c568c70a8 100644 (file)
--- a/lib/sfio/sfhdr.h
+++ b/lib/sfio/sfhdr.h
@@ -99,6 +99,10 @@ extern "C" {
 #include       <stdint.h>
 #endif
 
+#if _hdr_stddef
+#include       <stddef.h>
+#endif
+
 #if _hdr_time
 #include       <time.h>
 #endif