[libIDL] Fix build error in configure.in. Patch from Tobias Mueller. Closes bug #587809.

[Kjartan Maraas <kmaraas src gnome org>]

commit 6a3a5b449f393d11486344480637577203445600
Author: Kjartan Maraas <kmaraas gnome org>
Date:   Wed Oct 28 20:22:04 2009 +0100

    Fix build error in configure.in. Patch from Tobias Mueller. Closes bug #587809.

 configure.in |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/configure.in b/configure.in
index 9ada2cf..6dd5386 100644
--- a/configure.in
+++ b/configure.in
@@ -115,7 +115,8 @@ AC_CHECK_SIZEOF(long long)
 AC_MSG_CHECKING(for format to printf and scanf a guint64)
 AC_CACHE_VAL(libIDL_cv_long_long_format,[
     for format in ll q I64; do
-	AC_TRY_RUN([#include <stdio.h>  
+	AC_TRY_RUN([#include <stdio.h>
+	    #include <stdlib.h>  
 	    int main()
 	    {
 		long long b, a = -0x3AFAFAFAFAFAFAFALL;