Fix NaN issue in Lambert azimuthal projection
Calculation didn't check if arcsin() argument was >1, which occurs for some points outside of map area
Fixes segfault while zooming in Lambert projection while mouse cursor is outside map: #7 (closed)
Calculation didn't check if arcsin() argument was >1, which occurs for some points outside of map area
Fixes segfault while zooming in Lambert projection while mouse cursor is outside map: #7 (closed)