Don't return false from IsOk() for accelerators without flags.

wxAcceleratorEntry::IsOk() checked for m_flags != 0 for some reason. Simply
remove this test.

See #12444.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@65497 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/accel.h

@@ -107,8 +107,7 @@ public:
 
     bool IsOk() const
     {
-        return m_flags != 0 &&
+        return  m_keyCode != 0;
-               m_keyCode != 0;
     }