Update Sizzle: avoid calling setDocument when possible

diff --git a/src/sizzle b/src/sizzle
index 7dbf116f043f1865791a626972c4c3a90311cf53..3ab191e5c16295de69d91775602f7cd75672accb 160000 (submodule)
--- a/src/sizzle
+++ b/src/sizzle
@@ -1 +1 @@
-Subproject commit 7dbf116f043f1865791a626972c4c3a90311cf53
+Subproject commit 3ab191e5c16295de69d91775602f7cd75672accb