an stdio fix

[Bruno Haible]

The <stdio.h> substitute is not self-contained if the 'snprintf' or 'vsnprintf'
module is used: it is lacking a definition of size_t.

2007-03-05  Bruno Haible  <address@hidden>

        * lib/stdio_.h: Include <stddef.h>.

*** lib/stdio_.h        21 Feb 2007 02:18:10 -0000      1.1
--- lib/stdio_.h        6 Mar 2007 03:17:11 -0000
***************
*** 29,34 ****
--- 29,35 ----
  #include @ABSOLUTE_STDIO_H@
  
  #include <stdarg.h>
+ #include <stddef.h>
  
  
  /* The definition of GL_LINK_WARNING is copied here.  */