SchemaLoader loadCompiledTypeAndDependencies() ignores generic struct's parameter types

[lewinb-corp]

Using a schema like

struct A {}

struct Struct (Parameter) {
  field @0 :Parameter;
}

struct ConsumingStruct {
  field @0 :Struct(A);
}

will lead to the SchemaLoader ignoring type A when loading the schema for ConsumingStruct using loadCompiledTypeAndDependencies(). Unfortunately the schema loader code is a bit too complex for me to dive right in and fix this (or even see if this is something that can be fixed easily enough).