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webfs: fix "fd out of range" error message

--- a/sys/src/cmd/webfs/http.c

+++ b/sys/src/cmd/webfs/http.c

@@ -122,14 +122,15 @@

 		snprint(addr, sizeof(addr), "tcp!%s!%s",

 			proxy->host, proxy->port ? proxy->port : proxy->scheme);

-	if((fd = dial(addr, 0, 0, &ctl)) >= 0){

-		if(proxy){

-			if(strcmp(proxy->scheme, "https") == 0)

-				fd = tlswrap(fd, proxy->host);

-		} else {

-			if(strcmp(u->scheme, "https") == 0)

-				fd = tlswrap(fd, u->host);

-		}

+	if((fd = dial(addr, 0, 0, &ctl)) < 0)

+		return nil;

+

+	if(proxy){

+		if(strcmp(proxy->scheme, "https") == 0)

+			fd = tlswrap(fd, proxy->host);

+	} else {

+		if(strcmp(u->scheme, "https") == 0)

+			fd = tlswrap(fd, u->host);

 	}

 	if(fd < 0){

 		close(ctl);

-- 

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