botched previous patch.

Reference: /n/atom/patch/applied2013/csstrdup2
Date: Sun Oct 13 19:02:31 CES 2013
Signed-off-by: quanstro@quanstro.net

--- /sys/src/cmd/ndb/cs.c	Sun Oct 13 19:02:18 2013
+++ /sys/src/cmd/ndb/cs.c	Sun Oct 13 19:02:18 2013
@@ -2032,7 +2032,7 @@
 			continue;
 		}
 		free(nt->attr);
-		attr = strdup(attr);
+		nt->attr = strdup(attr);
 		l = &nt->entry;
 	}
 	return t;