API GetNumMapOverlays

__NOTOC__
Returns the number of overlays on the current world map (Overlays are the areas that fill in as they're discovered)
 numOverlays = GetNumMapOverlays();
==Parameters==
===Returns===
:;numOverlays : Number - The number of overlays on the current world map.
==Notes==
Information about each overlay can be obtained by using GetMapOverlayInfo(overlayIndex).