make sure that point will have no null coordinates

persist/src/main/resources/db/migration/14.0.0~alpha.1/V14.0.0.20190813__point_coordinates_cannot_be_null.sql

+-- just in case if any point on the map has null coordinates (it should never happen)
+update point_table set point_val = "0.0,0.0" where point_val = null;
+alter table point_table alter column point_val set not null;
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