RDS: make sure all sgs alloced are initialized

rds_message_alloc_sgs() now returns correctly-initialized
sg lists, so calleds need not do this themselves.

Signed-off-by: Andy Grover <andy.grover@oracle.com>
diff --git a/net/rds/message.c b/net/rds/message.c
index 4352ce7..7d678e2 100644
--- a/net/rds/message.c
+++ b/net/rds/message.c
@@ -249,7 +249,7 @@
 	WARN_ON(rm->m_used_sgs + nents > rm->m_total_sgs);
 
 	sg_ret = &sg_first[rm->m_used_sgs];
-
+	sg_init_table(sg_ret, nents);
 	rm->m_used_sgs += nents;
 
 	return sg_ret;