[msitools: 1/2] wixl: Make the ServiceControl attributes Remove/Start/Stop optional.

[Marc-André Lureau <malureau src gnome org>]

commit 619d9a9fdd5a6951f1f9f99bceded133256769cc
Author: Brendon Jones <brendonj waikato ac nz>
Date:   Wed Sep 30 10:10:30 2020 +1300

    wixl: Make the ServiceControl attributes Remove/Start/Stop optional.

 tools/wixl/builder.vala | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)
---
diff --git a/tools/wixl/builder.vala b/tools/wixl/builder.vala
index 63d3099..cccc163 100644
--- a/tools/wixl/builder.vala
+++ b/tools/wixl/builder.vala
@@ -913,9 +913,12 @@ namespace Wixl {
             if (service_control.Wait != null)
                 Wait = parse_yesno(service_control.Wait);
 
-            event |= install_mode_to_event(service_control.Start, ServiceControlEvent.INSTALL_START, 
ServiceControlEvent.UNINSTALL_START);
-            event |= install_mode_to_event(service_control.Stop, ServiceControlEvent.INSTALL_STOP, 
ServiceControlEvent.UNINSTALL_STOP);
-            event |= install_mode_to_event(service_control.Remove, ServiceControlEvent.INSTALL_DELETE, 
ServiceControlEvent.UNINSTALL_DELETE);
+            if (service_control.Start != null)
+                event |= install_mode_to_event(service_control.Start, ServiceControlEvent.INSTALL_START, 
ServiceControlEvent.UNINSTALL_START);
+            if (service_control.Stop != null)
+                event |= install_mode_to_event(service_control.Stop, ServiceControlEvent.INSTALL_STOP, 
ServiceControlEvent.UNINSTALL_STOP);
+            if (service_control.Remove != null)
+                event |= install_mode_to_event(service_control.Remove, ServiceControlEvent.INSTALL_DELETE, 
ServiceControlEvent.UNINSTALL_DELETE);
 
             db.table_service_control.add(service_control.Id, service_control.Name, event, ServiceArguments, 
Wait, comp.Id);
         }