add ST_IsValid where ST_PointOnSurface (#1025)

Same as #1015 for another ST_PointOnSurface

layers/place/update_island_polygon.sql

@@ -15,7 +15,8 @@ $$
     UPDATE osm_island_polygon
     SET geometry = ST_PointOnSurface(geometry)
     WHERE (full_update OR osm_id IN (SELECT osm_id FROM place_island_polygon.osm_ids))
-      AND ST_GeometryType(geometry) <> 'ST_Point';
+      AND ST_GeometryType(geometry) <> 'ST_Point'
+      AND ST_IsValid(geometry);
 
     UPDATE osm_island_polygon
     SET tags = update_tags(tags, geometry)

layers/poi/update_poi_polygon.sql

@@ -21,7 +21,8 @@ $$
                 ELSE ST_PointOnSurface(geometry)
                 END
     WHERE (full_update OR osm_id IN (SELECT osm_id FROM poi_polygon.osm_ids))
-      AND ST_GeometryType(geometry) <> 'ST_Point';
+      AND ST_GeometryType(geometry) <> 'ST_Point'
+      AND ST_IsValid(geometry);
 
     UPDATE osm_poi_polygon
     SET subclass = 'subway'

layers/water_name/update_water_point.sql

@@ -14,7 +14,8 @@ SELECT wp.osm_id,
 FROM osm_water_polygon AS wp
          LEFT JOIN lake_centerline ll ON wp.osm_id = ll.osm_id
 WHERE ll.osm_id IS NULL
-  AND wp.name <> '';
+  AND wp.name <> ''
+  AND ST_IsValid(wp.geometry);
 
 -- etldoc:  osm_water_polygon ->  osm_water_point
 -- etldoc:  lake_centerline ->  osm_water_point