[gnome-boxes] Make sure 'QEMU Session' exists at startup

[Christophe Fergeau <teuf src gnome org>]

commit fa307071db85613835f682253fed4d91b487afa4
Author: Christophe Fergeau <cfergeau redhat com>
Date:   Fri Sep 7 11:45:22 2012 +0200

    Make sure 'QEMU Session' exists at startup
    
    Without it, Boxes fails to start:
    
    (gnome-boxes:19000): Boxes-WARNING **: app.vala:322: No such file or directory
    error: missing or failing default libvirt connection
    $
    
    At startup, Boxes creates this file if ~/.config/gnome-boxes/sources/
    does not exist. It's better to directly check for the file we are
    interested in. Reason for this patch is that while testing other patches,
    this file went missing...
    
    https://bugzilla.gnome.org/show_bug.cgi?id=683558

 src/app.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/app.vala b/src/app.vala
index 195e64c..58d2842 100644
--- a/src/app.vala
+++ b/src/app.vala
@@ -305,7 +305,7 @@ private class Boxes.App: Boxes.UI {
 
     private async void setup_sources () {
 
-        if (!has_user_pkgconfig_sources ()) {
+        if (!FileUtils.test (get_user_pkgconfig_source ("QEMU Session"), FileTest.IS_REGULAR)) {
             var src = File.new_for_path (get_pkgdata_source ("QEMU_Session"));
             var dst = File.new_for_path (get_user_pkgconfig_source ("QEMU Session"));
             try {