scripted-diff: rename DescriptorImpl m_script_arg to m_subdescriptor_arg
scripted-diff: rename DescriptorImpl m_script_arg to m_subdescriptor_arg

-BEGIN VERIFY SCRIPT-
sed -i -e 's/m_script_arg/m_subdescriptor_arg/g' src/script/descriptor.cpp
-END VERIFY SCRIPT-

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