helgrind: Implement ANNOTATE_BENIGN_RACE_SIZED()

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12434 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/helgrind/helgrind.h b/helgrind/helgrind.h
index 8645866..433b1cb 100644
--- a/helgrind/helgrind.h
+++ b/helgrind/helgrind.h
@@ -603,7 +603,7 @@
 /* Same as ANNOTATE_BENIGN_RACE(address, description), but applies to
    the memory range [address, address+size). */
 #define ANNOTATE_BENIGN_RACE_SIZED(address, size, description) \
-   _HG_CLIENTREQ_UNIMP("ANNOTATE_BENIGN_RACE_SIZED")
+   VALGRIND_HG_DISABLE_CHECKING(address, size)
 
 /* Request the analysis tool to ignore all reads in the current thread
    until ANNOTATE_IGNORE_READS_END is called.  Useful to ignore