[Bug] Add check nil for calling `msgInfo`

[ArtGinn]

• When I check logic ParseIBCMessageFromEvent func handle switch event.Type, I see that we still have a chance to get default: return nil when the type of event is not in our list check (new type of event but forgot to add check,... ), this will make msgInfo equal to nil and this call msgInfo.ParseAttrs(log, event.Attributes) will issue the error.

• My suggestion is to add a check before calling msgInfo.ParseAttrs to secure our logic