Merge PR #1559

# Conflicts:
#	docs/whats-new.md

docs/whats-new.md

@@ -16,6 +16,10 @@
 - A photo whose Defringe amount was stored far past the sliders' 20 (in a damaged catalog or sidecar) no longer
   crashes LightCraft each time it renders: the amount acts as 20.
 
+### Reliability
+- Importing a preset zip that unpacks to far more than any preset (a "zip bomb") is refused with a message naming
+  the file, instead of asking for gigabytes of memory, which could end LightCraft.
+
 ### Slider drags on large raws
 - Dragging a slider no longer re-renders the edited photo's filmstrip thumbnail on every frame; it follows once you
   let go. On a 64 MP raw the first of those renders decoded the whole file again, which held up the loupe's