Update findblock.php

[shtse8]

Fixed Invalid Blockhash by listsinceblock.

RPC call did not return 200: HTTP error: 500 - JSON Response: [-8] Invalid blockhash

[TheSerapher]

Will this work with other coins too or would those throw an error then?

[TheSerapher]

Again against development branch please. And maybe test out another few coins just to make sure they also work with this change and won’t throw an error.

[shtse8]

I am sure bitcoin family coins work on this getblockhash api. because it is a standard api to get the blockhash by index. If we worry it will throw an error, we can try catch and then set an empty string like previous version. Also, I have pointed to development branch already.

[shtse8]

It should be fine now.
When it throw any exception returned by PRC, set it back to empty like previous version.

[TheSerapher]

Thanks!