New version of the back-end, which is marter about () in else branches.

sjrd · sjrd · commit b3ff28a371d9 · 2018-09-03T13:41:00.000+02:00
This removes the last nop's generating by the `Labeled`-based
pattern matcher.
diff --git a/scala-backend b/scala-backend
@@ -1 +1 @@
-Subproject commit 011d5c333d52fc6d9e45b9e33614abe9ac19a851
+Subproject commit 0e7ec5de60247d44aa4609bb8e194437a36596e8
