[PATCH] valgrind: ignore SSE-based strlen invalid reads

["Carlos Martín Nieto" <cmn@elego.de>]

The C library uses SSE instructions to make strlen (among others)
faster, loading 4 bytes at a time and reading past the end of the
allocated memory. This read is safe and when the strlen function is
inlined, it is (obviously) not replaced by valgrind, which reports a
false-possitive.

Tell valgrind to ignore this particular error, as the read is, in
fact, safe.

Signed-off-by: Carlos Martín Nieto <cmn@elego.de>
---
 t/valgrind/default.supp |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/t/valgrind/default.supp b/t/valgrind/default.supp
index 9e013fa..327478c 100644
--- a/t/valgrind/default.supp
+++ b/t/valgrind/default.supp
@@ -43,3 +43,9 @@
 	fun:write_buffer
 	fun:write_loose_object
 }
+
+{
+	ignore-sse-strlen-invalid-read-size
+	Memcheck:Addr4
+	fun:copy_ref
+}
\ No newline at end of file
-- 
1.7.4.1