[gnome-session] build: add AM_PROG_CC_C_O to configure

[Ray Strode <halfline src gnome org>]

commit 8b77e723680ec495e57ff6643961869400d2901e
Author: Ray Strode <rstrode redhat com>
Date:   Tue Sep 21 14:25:00 2010 -0400

    build: add AM_PROG_CC_C_O to configure
    
    I'm doing this because autogoo told me to.

 configure.ac |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 94cbbe2..29f99af 100644
--- a/configure.ac
+++ b/configure.ac
@@ -16,6 +16,7 @@ IT_PROG_INTLTOOL([0.40.0])
 
 AC_ISC_POSIX
 AC_PROG_CC
+AM_PROG_CC_C_O
 AC_STDC_HEADERS
 AM_PROG_LIBTOOL
 AC_PATH_PROG(GLIB_GENMARSHAL, glib-genmarshal)