Sized array in event parameters and changetype

[YaroShkvorets]

Usually an event in ABI would have dynamic array parameter, i.e.

{
"indexed": false,
"name": "route",
"type": "address[]"
},

But sometimes it could contain sized array, i.e.:

{
"indexed": false,
"name": "route",
"type": "address[11]"
},

Example

When this is the case, #1892 stops working as intended.
Need to handle that case.