slotmap: Add "DELETE_REQ" state

Change-Id: I953e72e304d6403b2e47f7546a36abfdf246e44b
diff --git a/src/slotmap.c b/src/slotmap.c
index 12d7777..a8874fb 100644
--- a/src/slotmap.c
+++ b/src/slotmap.c
@@ -17,6 +17,7 @@
 	{ SLMAP_S_NEW,			"NEW" },
 	{ SLMAP_S_UNACKNOWLEDGED,	"UNACKNOWLEDGED" },
 	{ SLMAP_S_ACTIVE,		"ACTIVE" },
+	{ SLMAP_S_DELETE_REQ,		"DELETE_REQ" },
 	{ SLMAP_S_DELETING,		"DELETING" },
 	{ 0, NULL }
 };