Fix Mac crash on exit.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@15954 a592a061-630c-0410-9148-cb99ea01b6c8

src/lyx_main.C

@@ -159,6 +159,17 @@ struct LyX::Singletons
 
 boost::scoped_ptr<LyX> LyX::singleton_;
 
+LyX::~LyX()
+{
+	// Static data are not treated in the same way at all on the Mac (and
+	// the LyX singleton has static methods). This is the reason why the
+	// exit command on the Mac bypasses our dispatch machinery altogether.
+	// On Linux and Windows we won't pass a second time through quit()
+	// because quitting will already be set to true.
+	if (!quitting)
+		quit();
+}
+
 
 int LyX::exec(int & argc, char * argv[])
 {

src/lyx_main.h

@@ -40,6 +40,9 @@ namespace frontend { class Application; }
 /// initial startup
 class LyX : boost::noncopyable {
 public:
+
+	~LyX();
+
 	/**
 	 * Execute LyX. The startup sequence is as follows:
 	 * -# LyX::exec()