Message count for MQ::Queue isn't reported properly, it's always 0

[botanicus]

The problem is somewhere in Protocol::Queue::DeclareOk, I'm always getting [:@message_count, 0]. Here's the failing spec: https://github.com/botanicus/amqp/commit/edc29483eac4119c407166b589f00b43234ccb2f#L1R20

[botanicus]

Actually this is an invalid issue, I removed the failing spec in ruby-amqp@9cdc94d The message-count isn't documented in the AMQP spec, but when I use publish more messages, for example 300, then the message_count is always bigger than 0, which means it does something (the question is what).