ensure finishable is marked as closed if underlying body is empty

Author: korbin

lib/async/http/protocol/http1/finishable.rb

@@ -29,6 +29,8 @@ def read
 						@reading = true
 
 						super
+					ensure
+						@closed.value = true if @body.empty?
 					end
 
 					def close(error = nil)