[network-manager-applet/nma-1-2] c-e: fix sensitivity of "Export" button for VPN

[Thomas Haller <thaller src gnome org>]

commit 637195f26bb61349c92c82c30a74d34687b7d671
Author: Thomas Haller <thaller redhat com>
Date:   Mon Jun 27 18:41:52 2016 +0200

    c-e: fix sensitivity of "Export" button for VPN
    
    Fixes: bd20efeb915a6f2959e061f75a84abe23fea39e6
    (cherry picked from commit 324f17354146242307687c75908cba0362606c8c)

 src/connection-editor/nm-connection-editor.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/connection-editor/nm-connection-editor.c b/src/connection-editor/nm-connection-editor.c
index 430ce8f..7bba10b 100644
--- a/src/connection-editor/nm-connection-editor.c
+++ b/src/connection-editor/nm-connection-editor.c
@@ -222,7 +222,7 @@ done:
                editor->last_validation_error = g_strdup (validation_error);
        }
        ce_polkit_button_set_validation_error (CE_POLKIT_BUTTON (editor->ok_button), validation_error);
-       gtk_widget_set_sensitive (editor->export_button, !!validation_error);
+       gtk_widget_set_sensitive (editor->export_button, !validation_error);
 
        update_sensitivity (editor);