Fix Type-based Call-Graphs with Multiple Inheritance #776
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The RTAResolver and CHAResolver give wrong results in some case of multiple inheritance.
When virtually calling a function through a receiver of a non-primary base-class (that is not the first base in case of multiple inheritance) the analysis may falsely use the (correct) virtual index on the vtable of the first base class, even if the receiver is one of the secondary bases.
It may make sense to merge #773 first.