[gnome-control-center] network: Fix build

[Bastien Nocera <hadess src gnome org>]

commit 3f8e94a3ce456411c1fbfaa5621124f27f76bb16
Author: Bastien Nocera <hadess hadess net>
Date:   Wed Jan 30 20:10:53 2013 +0100

    network: Fix build
    
    ../../../../panels/network/connection-editor/ce-page-ip4.c:32:39: fatal error: egg-list-box/egg-list-box.h: No such file or directory

 panels/network/connection-editor/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/panels/network/connection-editor/Makefile.am b/panels/network/connection-editor/Makefile.am
index 1b9c6aa..72fac63 100644
--- a/panels/network/connection-editor/Makefile.am
+++ b/panels/network/connection-editor/Makefile.am
@@ -33,6 +33,7 @@ libconnection_editor_la_SOURCES = 		\
 
 libconnection_editor_la_CPPFLAGS = 		\
 	$(PANEL_CFLAGS)				\
+	-I$(top_srcdir)				\
 	-I$(srcdir)/../wireless-security	\
 	$(NETWORK_PANEL_CFLAGS) 		\
         $(NETWORK_MANAGER_CFLAGS)		\