Made arguments of bitmap manipulating functions more uniform.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@7674 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/exp-drd/drd_suppression.c b/exp-drd/drd_suppression.c
index 71a4c60..6aab43a 100644
--- a/exp-drd/drd_suppression.c
+++ b/exp-drd/drd_suppression.c
@@ -62,7 +62,7 @@
 
   tl_assert(a1 < a2);
   tl_assert(! drd_is_any_suppressed(a1, a2));
-  bm_access_range(s_suppressed, a1, a2 - a1, eStore);
+  bm_access_range(s_suppressed, a1, a2, eStore);
 }
 
 void drd_finish_suppression(const Addr a1, const Addr a2)