Change Description

When FW_QUEUE_REGISTRATION is 0, Os::Queue::s_queueRegistry cannot be defined or accessed, because it is not declared in Os/Queue.hpp. It results in a compilation error.

Rationale

F Prime's supported configuration options should not cause the build to fail.

Testing/Review Recommendations

n/a

Future Work

1. This is another sign that we need a more comprehensive set of regression tests for F Prime's long list of configuration options.
2. It is not clear to me whether this configuration option is truly necessary. Platforms that care about pruning code and data to this extent should be using Link Time Optimization, which (in my testing) appears to be able to optimize away this code on its own.