FYI: fix for AC_STRUCT_ST_* examples

[Pavel Roskin]

ChangeLog:
        * doc/autoconf.texi (Particular Structures): Fixed examples for
        AC_STRUCT_ST_BLKSIZE and AC_STRUCT_ST_RDEV.

Index: doc/autoconf.texi
--- doc/autoconf.texi   Fri Nov 10 20:29:37 2000
+++ doc/autoconf.texi   Fri Nov 10 22:59:45 2000
@@ -3803,7 +3803,11 @@
 the future.  This macro is obsoleted, and should be replaced by
 
 @example
-AC_CHECK_MEMBERS((struct stat.st_blksize))
address@hidden
+AC_CHECK_MEMBERS([struct stat.st_blksize],,,
+[#include <sys/types.h>
+#include <sys/stat.h>])
address@hidden group
 @end example
 @end defmac
 
@@ -3829,7 +3833,11 @@
 
 This macro is obsoleted, and should be replaced by
 @example
-AC_CHECK_MEMBERS((struct stat.st_rdev))
address@hidden
+AC_CHECK_MEMBERS([struct stat.st_rdev],,,
+[#include <sys/types.h>
+#include <sys/stat.h>])
address@hidden group
 @end example
 
 @end defmac