Fix prev change; test of _STDDEF_H was backwards.

From-SVN: r2775

diff --git a/gcc/ginclude/stddef.h b/gcc/ginclude/stddef.h
index 774462c..4601547 100644 (file)
--- a/gcc/ginclude/stddef.h
+++ b/gcc/ginclude/stddef.h
@@ -170,8 +170,9 @@ typedef __WCHAR_TYPE__ wchar_t;
     header files do that.  */
 #ifdef _ANSI_H_
 #undef _PTRDIFF_T_
-#ifndef _STDDEF_H /* This is a kludge.  The case where this happens
-                    is when obstack.h wants just ptrdiff_t.  */
+#ifdef _STDDEF_H /* This is a kludge.
+                   _STDDEF_H is defined when we are using the whole file,
+                   undefined when obstack.h wants just ptrdiff_t.  */
 #undef _SIZE_T_
 #undef _WCHAR_T_
 #endif