artemp b4b5e33b05 refactor WKT generator to retain geometry type for empty geometries (avoid short-cutting to POINT EMPTY)
For example:

| in |   | out   |
|`POINT EMPTY` |  <--> | 'POINT EMPTY`|
|`LINESTRING EMPTY` |  --> | 'POINT EMPTY`|

| in |   | out   |
|`POINT EMPTY` |  <--> | 'POINT EMPTY`|
|`LINESTRING EMPTY` |  <--> | 'LINESTRING EMPTY`|
etc.
2017-03-21 12:43:42 +00:00
..