[baobab] location: Update mount only if it has really changed

[Stefano Facchini <sfacchini src gnome org>]

commit 7ad8386f7896df7274a607123479bf258e6c3844
Author: Stefano Facchini <stefano facchini gmail com>
Date:   Tue Jun 2 14:56:01 2020 +0200

    location: Update mount only if it has really changed

 src/baobab-location.vala | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)
---
diff --git a/src/baobab-location.vala b/src/baobab-location.vala
index 779a2a2..ea373a2 100644
--- a/src/baobab-location.vala
+++ b/src/baobab-location.vala
@@ -127,15 +127,18 @@ namespace Baobab {
         }
 
         public void update_volume_info () {
-            mount = volume.get_mount ();
-
             is_remote = volume.get_identifier (VolumeIdentifier.CLASS) == "network";
 
-            if (mount != null) {
-                fill_from_mount ();
+            var new_mount = volume.get_mount ();
+            if (new_mount != null) {
+                if (new_mount != mount) {
+                    mount = new_mount;
+                    fill_from_mount ();
+                }
             } else {
                 name = volume.get_name ();
                 icon = volume.get_icon ();
+                mount = null;
                 file = null;
                 size = null;
                 used = null;