[glib] gio-tool: fix inverted logic in monitor tool

[Christian Kellner <gicmo src gnome org>]

commit b9b7a1d03920c3ba719a3223b20bae12c97b7eb2
Author: Christian Kellner <christian kellner me>
Date:   Wed Nov 8 21:16:37 2017 +0100

    gio-tool: fix inverted logic in monitor tool
    
    The tool should refuse to work if none of the locations to watch
    are set, not if *any* of them are unset.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=790093

 gio/gio-tool-monitor.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gio/gio-tool-monitor.c b/gio/gio-tool-monitor.c
index 9c0352c..d6de7a2 100644
--- a/gio/gio-tool-monitor.c
+++ b/gio/gio-tool-monitor.c
@@ -223,7 +223,7 @@ handle_monitor (int argc, gchar *argv[], gboolean do_help)
       return 1;
     }
 
-  if (!watch_dirs || !watch_files || !watch_direct || !watch_silent || !watch_default)
+  if (!watch_dirs && !watch_files && !watch_direct && !watch_silent && !watch_default)
     {
       show_help (context, _("No locations given"));
       g_option_context_free (context);