Add st_isvalid check to imposm3 generalized tables

Fix #386

layers/water_name/update_water_lakeline.sql

@@ -13,7 +13,7 @@ CREATE MATERIALIZED VIEW osm_water_lakeline AS (
 		ST_Area(wp.geometry) AS area
     FROM osm_water_polygon AS wp
     INNER JOIN lake_centerline ll ON wp.osm_id = ll.osm_id
-    WHERE wp.name <> ''
+    WHERE wp.name <> '' AND ST_IsValid(wp.geometry)
 );
 CREATE INDEX IF NOT EXISTS osm_water_lakeline_geometry_idx ON osm_water_lakeline USING gist(geometry);