fixing modal dialog quit after nested message box problem

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@60963 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/osx/cocoa/dialog.mm

@@ -47,12 +47,15 @@ void wxDialog::DoShowModal()
     NSWindow* theWindow = GetWXWindow();
     
     NSModalSession session = [NSApp beginModalSessionForWindow:theWindow];
+    int response = 0;
     while (IsModal()) 
     {
         wxMacAutoreleasePool autoreleasepool;
-        if ([NSApp runModalSession:session] != NSRunContinuesResponse)
-            break;
-        // TODO should we do some idle processing ?
+        // we cannot break based on the return value, because nested
+        // alerts might set this to stopped as well, so it would be
+        // unsafe
+        [NSApp runModalSession:session];
+        // TODO Idle
     }
     [NSApp endModalSession:session];