revert accidental osm2pgsql version downgrade

diff --git a/osm2pgsql b/osm2pgsql
index 49089cb1a3c72ad97b57db21716a5fa07d4f2f8a..b59765e3ac591ff84f21f4a1153e7c18a2d2b855 160000 (submodule)
--- a/osm2pgsql
+++ b/osm2pgsql
@@ -1 +1 @@
-Subproject commit 49089cb1a3c72ad97b57db21716a5fa07d4f2f8a
+Subproject commit b59765e3ac591ff84f21f4a1153e7c18a2d2b855