Avoid memory leak in nfs_serv.c

[David]

>From NetBSD.

Index: nfs_serv.c
===================================================================
RCS file: /cvs/src/sys/nfs/nfs_serv.c,v
retrieving revision 1.77
diff -u -p -r1.77 nfs_serv.c
--- nfs_serv.c  20 Jul 2009 16:49:40 -0000      1.77
+++ nfs_serv.c  30 Jul 2009 23:11:33 -0000
@@ -2489,6 +2489,7 @@ again:
        if (cpos >= cend || ncookies == 0) {
                toff = off;
                siz = fullsiz;
+               free(cookies, M_TEMP);
                goto again;
        }
 
@@ -2698,6 +2699,7 @@ again:
        if (cpos >= cend || ncookies == 0) {
                toff = off;
                siz = fullsiz;
+               free(cookies, M_TEMP);
                goto again;
        }