kiss: fix checksums error. Closes #220

kiss

@@ -627,7 +627,7 @@ pkg_etcsums() {
     # This can't be a simple 'find -exec' as 'sh256' is a shell function
     # and not a real command of any kind. This is the shell equivalent.
     find "$pkg_dir/$1/etc" ! -type d | sort | while read -r line; do
-        sh256 "$line"
+        [ ! -e "$line" ] || sh256 "$line"
     done > "$pkg_dir/$1/$pkg_db/$1/etcsums"
 }