Fix crash in Capture File Properties dialog

Fixes crash when a capture file is closed while the capture file
properties dialog is open.

Change-Id: Iba35be38e1f53d422ff8428a672703385d477660
Reviewed-on: https://code.wireshark.org/review/12224
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Peter Wu <peter@lekensteyn.nl>

1 files changed, 2 insertions, 1 deletions

diff --git a/ui/qt/capture_file_properties_dialog.cpp b/ui/qt/capture_file_properties_dialog.cpp
index 50672af9dd..a76002cffd 100644
--- a/ui/qt/capture_file_properties_dialog.cpp
+++ b/ui/qt/capture_file_properties_dialog.cpp
@@ -86,7 +86,7 @@ void CaptureFilePropertiesDialog::updateWidgets()
     QPushButton *refresh_bt = ui->buttonBox->button(QDialogButtonBox::Reset);
     QPushButton *save_bt = ui->buttonBox->button(QDialogButtonBox::Save);
 
-    if (file_closed_) {
+    if (file_closed_ || !cap_file_.isValid()) {
         if (refresh_bt) {
             refresh_bt->setEnabled(false);
         }
@@ -94,6 +94,7 @@ void CaptureFilePropertiesDialog::updateWidgets()
         if (save_bt) {
             save_bt->setEnabled(false);
         }
+        WiresharkDialog::updateWidgets();
         return;
     }