update osm2pgsql (get rid of way-node index)

diff --git a/osm2pgsql b/osm2pgsql
index 10c274f851b63547d8e1a194231a67f8f0f8aed6..d2afef62a4a0d72c547103392cffcdda25687c6e 160000 (submodule)
--- a/osm2pgsql
+++ b/osm2pgsql
@@ -1 +1 @@
-Subproject commit 10c274f851b63547d8e1a194231a67f8f0f8aed6
+Subproject commit d2afef62a4a0d72c547103392cffcdda25687c6e