correction: use iterator when removing in loop

git-svn-id: http://svn.mkgmap.org.uk/mkgmap/trunk@3223 25d90789-57f7-4ee0-8453-03a3dfeeeb22
emit warning in StyledConverter when a POI (e.g. a barrier) changes routing on multiple ways.
The message:
Access restriction in POI node ... affects routing on multiple ways

The wiki for barrier=* says: 
Avoid tagging highway intersections as that does not make 
clear which way has the impediment

git-svn-id: http://svn.mkgmap.org.uk/mkgmap/trunk@3224 25d90789-57f7-4ee0-8453-03a3dfeeeb22
enhance check-styles option for lines file

report use of non-routable type in combination
with road_class and/or road_speed value at level 0.





git-svn-id: http://svn.mkgmap.org.uk/mkgmap/trunk@3225 25d90789-57f7-4ee0-8453-03a3dfeeeb22