OSV-2020-1641 Use-of-uninitialized-value in us_internal_dispatch_ready_poll

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=25057 Crash type: Use-of-uninitialized-value Crash state: usinternaldispatchreadypoll uslooprun uWS::TemplatedApp::run...