Fix loop capsule name mismatch in channel wait functions - #38

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‘EVENT_LOOP_CAPSULE_NAME’ defined but not used [-Wunused-variable]

‘EVENT_LOOP_ATTR_NAME’ defined but not used [-Wunused-variable]

‘ReactorBuffer_as_sequence’ defined but not used [-Wunused-variable]

ignoring return value of ‘write’ declared with attribute ‘warn_unused_result’ [-Wunused-result]