Tweaks to keep the Microsoft compiler quiet.
diff --git a/Objects/mappingobject.c b/Objects/mappingobject.c
index 51f0018..cd915e9 100644
--- a/Objects/mappingobject.c
+++ b/Objects/mappingobject.c
@@ -168,7 +168,7 @@
register unsigned incr;
register unsigned long sum = (unsigned long) hash;
register mappingentry *freeslot = NULL;
- register int mask = mp->ma_size-1;
+ register unsigned int mask = mp->ma_size-1;
mappingentry *ep0 = mp->ma_table;
register mappingentry *ep;
/* We must come up with (i, incr) such that 0 <= i < ma_size