[2.0.58] space-location.starmap_icons only used if space-location.starmap_icon exists

[Quezler]

starmap_icons is only used when starmap_icon is defined, you can set starmap_icon to something nonsensical like "blep" in order for the game to notice it and subsequently ignore it since starmap_icons is defined.

the expected behavior is that starmap_icons loads when starmap_icon is nil.

[Rseding91]

Thanks for the report. This is now fixed for the next release.