[network-manager-pptp] Avoid to specifiy src SUBDIRS twice

[Michael Biebl <mbiebl src gnome org>]

commit 00b36b89bf331a3dd98b84ce77e0219bca7c47a5
Author: Michael Biebl <biebl debian org>
Date:   Thu Apr 23 20:00:32 2009 +0200

    Avoid to specifiy src SUBDIRS twice
---
 Makefile.am |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/Makefile.am b/Makefile.am
index 68e3e50..eadbb2a 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,9 +1,9 @@
 AUTOMAKE_OPTIONS = foreign
 
-if WITH_GNOME
-SUBDIRS = src common-gnome auth-dialog properties po
-else
 SUBDIRS = src
+
+if WITH_GNOME
+SUBDIRS += common-gnome auth-dialog properties po
 endif
 
 dbusservicedir = $(sysconfdir)/dbus-1/system.d