SubVI Params of type "io" do not handle inputs correctly from the callee

[sanmut]

A parameter in a SubVI is marked "io" does not get the input from the caller VI correctly. The default value specified in the parameter is used in the SubVI. Refer SubVI_InputOutput call in test-it/ViaTests/WildCardArgumentsSubVICalls.via. The inputs when passed from caller are not reflected correctly.

We are not being bitten by this much from the VI layer as the generated VIA code seems to have only "input" and "output" type parameters and not "input-output" type parameters.