Fix bug in GeolocateControl where _circleElement is being modified before it has been created

[andrewharvey]

mapbox-gl-js version: master (unreleased yet)

browser: all

Through investigation at #9279 together with @Meekohi and @pakastin we identified a bug in #9253 which in some situations lead to an error where _circleElement was attempted to be modified before it has been created.

[andrewharvey]

closed by #9288