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9660srv: fix memory leak

--- a/sys/src/cmd/9660srv/main.c

+++ b/sys/src/cmd/9660srv/main.c

@@ -246,6 +246,7 @@

 	p = malloc(n);

 	if(p == 0)

 		error("no memory");

+	setmalloctag(p, getcallerpc(&n));

 	return p;

 }

@@ -365,8 +366,6 @@

 	}

 	if(waserror()){

-		if(nf != nil)

-			xfile(req->newfid, Clunk);

 		if(rep->nwqid == req->nwname){

 			if(oldlen)

 				free(oldptr);

@@ -378,6 +377,8 @@

 			f->ptr = oldptr;

 			f->len = oldlen;

 		}

+		if(nf != nil)

+			xfile(req->newfid, Clunk);

 		if(rep->nwqid==req->nwname || rep->nwqid > 0){

 			err_msg[0] = '\0';

 			return;

-- 

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