set_layer_attr
use set_layer_attr
use set_layer_attr
use set_layer_attr
use set_layer_attr
Bugfix: remove artefacts on map
set_layer_attr_full instead of set_layer_attr to save more memory

Thanks ron064's idea

Free RAM available (heap): 7954 => 7790  (-164 bytes)
Merge pull request #7 from ron064/ReduceMem

Thanks a lot for your help!
Merge remote-tracking branch 'github_pb/master' into ReduceMem
Merge remote-tracking branch 'github/feature_remove_float'
Merge branch 'debug_map'
v1.4.2