Up version to 1.5a2 -- we're close enough (even though I'm still
expecting some contributions).
diff --git a/Include/patchlevel.h b/Include/patchlevel.h
index fec20e1..af1b3f9 100644
--- a/Include/patchlevel.h
+++ b/Include/patchlevel.h
@@ -1 +1 @@
-#define PATCHLEVEL "1.5.2a1"
+#define PATCHLEVEL "1.5.2a2"