small spi patch

[Euler Taveira de Oliveira <euler(at)timbira(dot)com>]

Hi,

This is small patch fixes a spi example (PG_MODULE_MAGIC is required as
of PostgreSQL 8.2) and provides a link to compiling and linking section.


-- 
  Euler Taveira de Oliveira
  http://www.timbira.com/

*** spi.sgml.orig	2007-08-23 23:57:09.000000000 -0300
--- spi.sgml	2007-08-24 00:06:37.000000000 -0300
***************
*** 3325,3330 ****
--- 3325,3334 ----
  <programlisting>
  #include "executor/spi.h"
  
+ #ifdef PG_MODULE_MAGIC
+ PG_MODULE_MAGIC;
+ #endif
+ 
  int execq(text *sql, int cnt);
  
  int
***************
*** 3380,3386 ****
  
    <para>
     This is how you declare the function after having compiled it into
!    a shared library:
  
  <programlisting>
  CREATE FUNCTION execq(text, integer) RETURNS integer
--- 3384,3390 ----
  
    <para>
     This is how you declare the function after having compiled it into
!    a shared library (details are in <xref linkend="dfunc">.):
  
  <programlisting>
  CREATE FUNCTION execq(text, integer) RETURNS integer