Sizzle: space combinator update

diff --git a/src/sizzle b/src/sizzle
index 5003712864806b1a2e5fee63b1c531b2841000e9..299e076fc847109d7b4cd49bd30145ceb534f23a 160000 (submodule)
--- a/src/sizzle
+++ b/src/sizzle
@@ -1 +1 @@
-Subproject commit 5003712864806b1a2e5fee63b1c531b2841000e9
+Subproject commit 299e076fc847109d7b4cd49bd30145ceb534f23a