add header to fix building with -Werror (issue #6718)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@12895 65c4cc65-6c06-0410-ace0-fbb531ad65f3

cdr/cdr_sqlite.c

@@ -36,6 +36,7 @@
 #include <unistd.h>
 #include <string.h>
 #include <stdlib.h>
+#include <stdio.h>
 #include <sqlite.h>
 
 #include "asterisk.h"