[mkgmap-dev] [PATCH v1] don't split background rectangle

Here's something from last year that I forgot to push out. I noticed that a RGM (Real Garmin Map) only contained a single background rectangle (0x4b) for each layer. i.e. the rectangle was not split like normal polys are. The attached patch makes our maps the same so you just get one 0x4b poly per level. I have not found any noticeable difference in mapsource behaviour with this patch but it's probably worth using if it has no issues simply because "that's how they do it". Mark