Wxgrass: Set computational region to the minimum necessary to enclose map data extent

[epatton]

As far as I'm aware, this functionality doesn't yet exist in wxgrass: Set the computational region to that of the smallest possible box which will completely enclose all non-null cells in the selected raster map.

The reason for this request is that sometimes setting the computational region to that of a selected raster doesn't crop the region bounds to the edges of raster cells; it seems to depend on the display window geometry. See the attached screenshot - the computational region has been set to the shown raster, but the region bounds seem to conform to the display window bounds rather than the edge to existing data.

[epatton]

The computational regiion extents do not crop to the data limits

[martinl]

I have added new items to the popup menu (for raster layers):

• Zoom to selected map (ignore NULLs)
• Set computational region from selected map (ignore NULLs)

r31984 and r31985

Martin