[BUG] False positive when asserting an error pointer

[nunnatsa]

Describe the bug
When asserting a pointer-error with HaveOccurred or Succeed, ginkgolinter detect the value as non error, and triggers a linter error.

To Reproduce

type myErr struct {
    code int
}

func (e *myErr) Error() string {
    ...
}

...
err = &myErr{code: 404}
Expect(err).To(HaveOccured())

Expected behavior
no linter error

Actual behavior
ginkgolinter mistakely detects err as not error type.

Environment:

• OS: linux
• Version v0.18.3

Additional context
Originally found here: containernetworking/cni#1148

[nunnatsa]

Released version with the fix: v0.18.4