EC2 Elastic IP panic fix

[PumpkinSeed]

Problem

Elastic IP run into this nil panic because of an unhandled pointer dereference.

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x1e22669]

goroutine 16 [running]:
github.com/tailwarden/komiser/providers/aws/ec2.ElasticIps({0x3564dd0, 0xc000126048}, {0xc000ff5d40, 0x0, {0x0, 0x0}, 0x0, 0x0, 0x0, 0x0, ...})
        /home/runner/work/komiser/komiser/providers/aws/ec2/elastic_ips.go:67 +0x449
github.com/tailwarden/komiser/providers/aws.FetchResources({_, _}, {0xc000ff5d40, 0x0, {0x0, 0x0}, 0x0, 0x0, 0x0, 0x0, ...}, ...)
        /home/runner/work/komiser/komiser/providers/aws/aws.go:96 +0x555
github.com/tailwarden/komiser/internal.fetchResources.func1({0x3564dd0?, 0xc000126048?}, {0xc000ff5d40, 0x0, {0x0, 0x0}, 0x0, 0x0, 0x0, 0x0, ...}, ...)
        /home/runner/work/komiser/komiser/internal/internal.go:270 +0x1e9
created by github.com/tailwarden/komiser/internal.fetchResources
        /home/runner/work/komiser/komiser/internal/internal.go:264 +0x109e

Solution

Handle the pointer dereference with an error in cause of nil value.