zzip: disable dead "err" assignments
zzip/file: remove pointless tells() call
zzip/zip: fix memory leak
Topography/shapelib: eliminate dead assignment
Topography/shapelib: fix memory leak
Merge branch 'origin-master' into github-master
AirspaceRenderer: move class AirspaceWarningCopy to separate header
Merge branch 'origin-master' into github-master