Nyall Dawson 99cfb8faf3 Fix processing algs crash when no source features exist
Instead we output an empty layer - this may be critical for
multi-step models where there is validly no features present
in a source layer
2017-06-23 13:49:32 +10:00
..
2016-09-21 23:30:04 +02:00
2013-08-20 09:22:03 +02:00