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port/chan.c: fix locking issue

--- a/sys/src/9/port/chan.c

+++ b/sys/src/9/port/chan.c

@@ -1015,15 +1015,15 @@

 				 * mh->mount->to == c, so start at mh->mount->next

 				 */

 				rlock(&mh->lock);

-				f = mh->mount;

-				for(f = (f? f->next: f); f; f = f->next)

-					if((wq = ewalk(f->to, nil, names+nhave, ntry)) != nil)

+				if((f = mh->mount) != nil)

+					f = f->next;

+				for(; f != nil; f = f->next)

+					if((wq = ewalk(f->to, nil, names+nhave, ntry)) != nil){

+						type = f->to->type;

+						dev = f->to->dev;

 						break;

+					}

 				runlock(&mh->lock);

-				if(f != nil){

-					type = f->to->type;

-					dev = f->to->dev;

-				}

 			}

 			if(wq == nil){

 				cclose(c);

@@ -1624,7 +1624,7 @@

 		goto Open;

 	default:

-		panic("unknown namec access %d\n", amode);

+		panic("unknown namec access %d", amode);

 	}

 	/* place final element in genbuf for e.g. exec */

-- 

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