WL#844: GIS: A particular geometry must check that only valid values are inserted

Affects: Server-7.0   —   Status: Un-Assigned   —   Priority: Medium

  For example, field of POINT type has te check that incoming
geometries are really points, but not linestrings or whatsoever.

This needs changes not only in spatial code, but in MySQL generally.

It now can't return error if it happend in Field->store()