Sizzle: fixes failing test in css

diff --git a/src/sizzle b/src/sizzle
index 1656af71d83ea1bf1861d646cc01d18a1d80d839..831c9c489ef90134436449b5c732f93f0a0b29bb 160000 (submodule)
--- a/src/sizzle
+++ b/src/sizzle
@@ -1 +1 @@
-Subproject commit 1656af71d83ea1bf1861d646cc01d18a1d80d839
+Subproject commit 831c9c489ef90134436449b5c732f93f0a0b29bb