Generic variable argument header. Hides ugly ifdef.

include/ac/stdarg.h

+/* Generic stdarg.h */
+
+#ifndef _AC_STDARG_H
+#define _AC_STDARG_H
+
+#if defined( HAVE_STDARG_H ) && \
+		( defined( __STDC__) || defined( __WIN32 )
+#	define HAVE_STDARG 1
+#	include <stdarg.h>
+#else
+#	include <vararg.h>
+#endif
+
+#endif /* _AC_STDARG_H */