[mkgmap-dev] [PATCH v1] Prefer multiples of 2048 as cut coordinates in multipolygons

Based on the proposal of Ralf Kleineisel the patch tries to cut multipolygons at multiples of 2048 in Garmin coordinates. This reduces artefacts at the cut lines of the multipolygons. The patch contains also a fix for the bug found by Nakor (Some inner areas are ignored in mulitpolygon processing). Please test it soon. I plan to commit that within the next 2 days if noone complains about it. WanMil