Delete built in export filters on exit

Originally committed to SVN as r5474.

aegisub/src/ass_export_filter.cpp

@@ -42,6 +42,7 @@
 
 #include "ass_export_filter.h"
 #include "ass_file.h"
+#include "utils.h"
 
 AssExportFilter::AssExportFilter(wxString const& name, wxString const& description, int priority)
 : name(name)
@@ -93,3 +94,7 @@ FilterList *AssExportFilterChain::GetFilterList() {
 	static FilterList instance;
 	return &instance;
 }
+
+void AssExportFilterChain::Clear() {
+	delete_clear(*GetFilterList());
+}

aegisub/src/ass_export_filter.h

@@ -60,17 +60,15 @@ typedef std::list<AssExportFilter*> FilterList;
 class AssExportFilterChain {
 	friend class AssExporter;
 
-	/// The list of registered filters
-	FilterList Filters;
-
 	/// Get the singleton instance
 	static FilterList *GetFilterList();
-	AssExportFilterChain() { }
 public:
 	/// Register an export filter
 	static void Register(AssExportFilter *filter);
 	/// Unregister an export filter; must have been registered
 	static void Unregister(AssExportFilter *filter);
+	/// Unregister and delete all export filters
+	static void Clear();
 };
 
 /// DOCME

aegisub/src/main.cpp

@@ -339,6 +339,9 @@ int AegisubApp::OnExit() {
 #ifdef WITH_AUTOMATION
 	delete global_scripts;
 #endif
+
+	AssExportFilterChain::Clear();
+
 #ifdef _DEBUG
 	delete emit_stdout;
 #endif