The addition of asyncrpcoperation_shieldcoinbase.cpp re-introduced a Mac-specific compiler incompatibility (size_t ambiguity errors); to solve, the same pre-existing compile-time fix present elsewhere (asyncrpcoperation_sendmany.cpp) was applied to asyncrpcoperation_shieldcoinbase.cpp, making this change a relatively safe one.
The addition of asyncrpcoperation_shieldcoinbase.cpp re-introduced a Mac-specific compiler incompatibility (size_t ambiguity errors); to solve, the same pre-existing compile-time fix present elsewhere (asyncrpcoperation_sendmany.cpp) was applied to asyncrpcoperation_shieldcoinbase.cpp, making this change a relatively safe one.