Fix use wxGUI Raster Digitizer input raster map layer temporary region

[tmszi]

To reproduce:

1. Create backup of the some raster map layer (g.copy) which you use in this test
2. On The Layer Manager add some raster map layer (which you copied in the first step)
3. Set computational region outside of the raster map layer (raster map layer added in the second step)
4. Zoom to raster map layer (raster map layer added in the second step).
5. On the Map display windows toolbar combobox widget choose Raster digitizer (start digitzing)
6. On the Raster digitizer toolbar choose Digitize point (add some points)
7. After digitization click on the Quit raster digitizer toolbar icon, and on the next confirm dialog click on the Yes button (save changes).
8. Result edited raster map layer consist null values only (check the raster map layer metadata with r.info)

Default behavior:

[petrasovaa]

Use_temp_region is not meant to be used in GUI, with this, the entire GUI is using the temporary region. The environment with GRASS_REGION variable needs to be passed to the rdigit's run_commands, similarly as in RenderMapMgr.GetRenderEnv() in core/render.py

[tmszi]

Hello, alright thank you very much for explanation.

[petrasovaa]

Thank you for quickly addressing this!