[baobab] Set handler id to 0

[Paolo Borelli <pborelli src gnome org>]

commit 0d7caeb1dd488f0b05e1cf0bac285cac294a53cb
Author: Paolo Borelli <pborelli gnome org>
Date:   Mon Aug 13 21:43:28 2012 +0200

    Set handler id to 0
    
    It is not really necessary since it gets reassigned when the scan starts, but it is
    clearer to set it to 0 anyway.

 src/baobab-window.vala |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/baobab-window.vala b/src/baobab-window.vala
index 065b7f9..e87bb2a 100644
--- a/src/baobab-window.vala
+++ b/src/baobab-window.vala
@@ -233,6 +233,7 @@ namespace Baobab {
         void set_active_location (Location location) {
             if (scan_completed_handler > 0) {
                 active_location.scanner.disconnect (scan_completed_handler);
+                scan_completed_handler = 0;
             }
 
             active_location = location;