Limit start location search radius

32 was an arbitrary number

src/start_location.cpp

@@ -204,7 +204,7 @@ tripoint start_location::find_player_initial_location() const
     popup_nowait( _( "Please wait as we build your world" ) );
     // Spiral out from the world origin scanning for a compatible starting location,
     // creating overmaps as necessary.
-    const int radius = 32;
+    const int radius = 3;
     for( const point &omp : closest_points_first( radius, point_zero ) ) {
         overmap &omap = overmap_buffer.get( omp.x, omp.y );
         const tripoint omtstart = omap.find_random_omt( target() );