fix sub-query by block height

[goomario]

Error in process <0.12824.0> on node 'arweave@127.0.0.1' with exit value:
{badarg,
    [{erlang,binary_to_integer,[557419],[]},
     {ar_http_iface_middleware,find_block,2,
...

[ldmberman]

Hey @goomario, thank you for looking into it.

This way if you ask for /height/2, it will search for a block with the hash <<"2">>, we need to do smth like this here instead.

[goomario]

Maybe use this:

find_block(<<"height">>, RawHeight) when is_integer(RawHeight) ->
	BI = ar_node:get_block_index(whereis(http_entrypoint_node)),
	ar_storage:read_block(RawHeight, BI);
find_block(<<"height">>, RawHeight) ->
	BI = ar_node:get_block_index(whereis(http_entrypoint_node)),
	ar_storage:read_block(binary_to_integer(RawHeight), BI);

[goomario]

It's work fine, I tested.

[ldmberman]

find_block(<<"height">>, RawHeight) when is_integer(RawHeight) -> - this should never match as RawHeight is a binary.