add missing include

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@32673 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/res_config_pgsql.c

@@ -27,6 +27,7 @@
  ***/
 
 #include <stdlib.h>
+#include <stdio.h>
 #include <string.h>
 #include <libpq-fe.h>			/* PostgreSQL */