channeld: fix crash with pre-TLV peers. #7650
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send_tlvs is NULL if no special features are supported, and peer sets `next_to_send` anyway: ``` 0x5ed1c6719538 peer_reconnect channeld/channeld.c:5205 0x5ed1c6719dab init_channel channeld/channeld.c:5959 0x5ed1c6719f04 main channeld/channeld.c:6005 ``` Backport: v24.08 Fixes: ElementsProject#7486 Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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send_tlvs is NULL if no special features are supported, and peer sets
next_to_sendanyway:Backport: v24.08
Fixes: #7486