go-tour: Fixing webcrawler solution.
Fixes #45

R=adg, r
CC=golang-dev
https://golang.org/cl/6823054
diff --git a/gotour/solutions/webcrawler.go b/gotour/solutions/webcrawler.go
index ec09a99..98074ce 100644
--- a/gotour/solutions/webcrawler.go
+++ b/gotour/solutions/webcrawler.go
@@ -61,7 +61,7 @@
 	for i, u := range urls {
 		fmt.Printf("-> Crawling child %v/%v of %v : %v.\n", i, len(urls), url, u)
 		go func(url string) {
-			Crawl(url, depth, fetcher)
+			Crawl(url, depth-1, fetcher)
 			done <- true
 		}(u)
 	}