use PyAPI_FUNC instead of DL_IMPORT. are we going to deprecate the old non-Py...

use PyAPI_FUNC instead of DL_IMPORT.  are we going to deprecate the old non-Py PREFIXED macros, etc?

Include/ast.h

@@ -4,8 +4,8 @@
 extern "C" {
 #endif
 
-extern DL_IMPORT(mod_ty) PyAST_FromNode(const node *, PyCompilerFlags *flags,
-					const char *);
+PyAPI_FUNC(mod_ty) PyAST_FromNode(const node *, PyCompilerFlags *flags,
+				  const char *);
 
 #ifdef __cplusplus
 }