[mkgmap-dev] [patch] add support for information=guidepost POI in default style

Hi, The default style currently has information=guidepost POIs set as a toilet icon. This patch changes information=guidepost to be an 'i' in a circle. For reference, here's an example of a POI with this tag: https://www.openstreetmap.org/node/2883638464 Thanks, Ben