v1.0.5: Don't fail forwardInvocation if mediator is nil'd
Pre-release
Pre-release
Summary: If the mediator has died then we don't want to fail on a `forwardInvocation:`, this will nil-message-send, which would be the behaviour if there was no forwarding involved Reviewed By: zeyadsalloum Differential Revision: D15133659 fbshipit-source-id: b2580a4b12751a96ee187b3b69ab7a1000e69dbf