sfio: remove some open coded nulls

diff --git a/lib/ast/sfstr.h b/lib/ast/sfstr.h
index 3dc681ae9f02bd6e17de9e2f8586bfd3d86c9666..bc4d48b93844d7cadcb85bbf5554e37a884cbe93 100644 (file)
--- a/lib/ast/sfstr.h
+++ b/lib/ast/sfstr.h
@@ -10,6 +10,8 @@
 
 #pragma once
 
+#include <stddef.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -20,7 +22,7 @@ extern "C" {
 
 #include <sfio/sfio.h>
 
-#define sfstropen()    sfnew((Sfio_t*)0,(char*)0,-1,-1,SF_WRITE|SF_STRING)
+#define sfstropen()    sfnew(NULL, NULL, -1, -1, SF_WRITE | SF_STRING)
 #define sfstrclose(f)  sfclose(f)
 
 #define sfstruse(f)    (sfputc(f,0), (char*)((f)->next = (f)->data) )