Fix deadlock when indirectly calling PLCObject's evaluator() from twisted of wx event loops. Was freezing while transfer/start/stop through Wamp. Serialize all PLCObject's call to self.PythonRuntimeCall into the same PythonThread thread.

                  <xsd:element name="Win32">
                    <xsd:complexType>
                      %(toolchain_gcc)s
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                  </xsd:element>