cmd/coordinator: fix build breakage

Change-Id: Ia20f95e96922c80616cb921cbd3eca8108e4b2fc
GitHub-Last-Rev: 5bfb2bed28eff959267bb1c3a014dc26a189b35d
GitHub-Pull-Request: golang/build#6
Reviewed-on: https://go-review.googlesource.com/118435
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/cmd/coordinator/reverse.go b/cmd/coordinator/reverse.go
index 87be0b4..f5ad724 100644
--- a/cmd/coordinator/reverse.go
+++ b/cmd/coordinator/reverse.go
@@ -316,7 +316,7 @@
 	// total maps from a host type to the number of machines which are
 	// capable of that role.
 	total := make(map[string]int)
-	for typ, host := range dashboard.Hosts[typ] {
+	for typ, host := range dashboard.Hosts {
 		if host.ExpectNum > 0 {
 			total[typ] = 0
 		}