fairphone4-case: Fix undef variable in demo

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/fairphone4-case.scad b/fairphone4-case.scad
index 3364cf231f8930bd864290a365ce2ab08e43a936..0c3c017be5b1e3fc2e76fcdc0b7397740976c41b 100644 (file)
--- a/fairphone4-case.scad
+++ b/fairphone4-case.scad
@@ -471,7 +471,7 @@ module AdhocMultiprintFrame(phase, z0, zs) {
     }
 }
 
-module KeeperProfile(fatter, slant=0){
+module KeeperProfile(fatter=0, slant=0){
   use_e = kppe + [0,-1] * slant * keeper_inner_width / keeper_slant_slope;
   polygon([use_e + [+1,-1] * fatter,
           kppd  + [ 0,-1] * fatter,