cps_class_attr_is_embedded() returns wrong data type

[mabnhdev]

The function cps_class_attr_is_embedded() is defined to return a bool type. In the "false" case, it returns a nullptr with no cast. This is a build error with certain compiles.

I suggest the following fix.

Change...
if (p==nullptr) return nullptr;
To...
if (p==nullptr) return false;