Panic recover during `GetActivity`

[Artur Minnullin]

Hey,

I'm getting the error when I try to fetch activities for the list:
activities, err := list.GetActivity(&gochimp3.BasicQueryParams{})

The log of error is the following:

runtime error: invalid memory address or nil pointer dereference
 stack trace 2985 bytes
 goroutine 70 [running]:
main.MW.func1.1.1.1(0xc4200aba48)

Perhaps it happens because the activity array for this list doesn't have any data.