Crash when opening planner in empty log

[Berthold Stoeger]

Hi Robert,

On Freitag, 28. Oktober 2022 22:56:33 CEST Robert Helling via subsurface 
wrote:

> just noticed: Current master crashes with memory violation when opening the
> planner on an empty log.

I have a suspicion. Could you try if this fixes the problem:

diff --git a/desktop-widgets/mainwindow.cpp b/desktop-widgets/mainwindow.cpp
index 2aeafeace..c8448aa6e 100644
--- a/desktop-widgets/mainwindow.cpp
+++ b/desktop-widgets/mainwindow.cpp
@@ -660,6 +660,7 @@ void MainWindow::on_actionReplanDive_triggered()
 	setApplicationState(ApplicationState::PlanDive);
 
 	disableShortcuts(true);
+	clear_dive(&displayed_dive);
 	profile->setPlanState(&displayed_dive, 0);
 	plannerWidgets->replanDive();
 }
@@ -673,6 +674,7 @@ void MainWindow::on_actionDivePlanner_triggered()
 	setApplicationState(ApplicationState::PlanDive);
 
 	disableShortcuts(true);
+	clear_dive(&displayed_dive);
 	profile->setPlanState(&displayed_dive, 0);
 	plannerWidgets->planDive();
 }

Thank you,

Berthold