Fix missing Default View Transform on equal operator (#1886)

Add the missing assignment of the the default view transform when a config is copied using the equal operator

Signed-off-by: Michael De Caria <decariamichael@gmail.com>
Signed-off-by: Doug Walker <doug.walker@autodesk.com>
Co-authored-by: Doug Walker <doug.walker@autodesk.com>

src/OpenColorIO/Config.cpp

@@ -435,7 +435,7 @@ class Config::Impl
             {
                 m_viewTransforms.push_back(vt->createEditableCopy());
             }
-
+            m_defaultViewTransform = rhs.m_defaultViewTransform;
             m_defaultLumaCoefs = rhs.m_defaultLumaCoefs;
             m_strictParsing = rhs.m_strictParsing;