Changed type of numarenas from uint to size_t to silence a GCC warning on 64bit OSes. Reviewed by Benjamin Peterson.
diff --git a/Misc/NEWS b/Misc/NEWS
index 7dc9c04..f7a18c0 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,9 @@
 Core and Builtins
 -----------------
 
+- Issue #3642: Changed type of numarenas from uint to size_t
+  in order to silence a compilier warning on 64bit OSes.
+
 Library
 -------