Rewrite error handling in APT to make it saner :/.

diff --git a/apt b/apt
index 9fa247dc9ba2aa28ae564e96cba5b2b23bcac91b..baec76f5f0f9fcbd71f6e2afaa7fc85543bd624c 160000 (submodule)
--- a/apt
+++ b/apt
@@ -1 +1 @@
-Subproject commit 9fa247dc9ba2aa28ae564e96cba5b2b23bcac91b
+Subproject commit baec76f5f0f9fcbd71f6e2afaa7fc85543bd624c