Sort release tags *after* limiting

`sortAscending = false` is not very useful unless one also sets
`numtagstodisplay = -1`, because the n releases *since inception*
instead of *since last release - 30* are displayed. This change
fixes that by sorting *only after* limiting results.

cmd/hvm/use.go

@@ -201,17 +201,18 @@ func (r *repository) fetchTags() error {
 		}
 	}
 
-	if Config.SortAscending {
-		semver.Sort(tagNames)
-	}
-
 	n := Config.NumTagsToDisplay
 	if n < 0 {
 		n = 9999
 	}
 	if n <= len(tagNames) {
 		tagNames = tagNames[len(tagNames)-n:]
 	}
+
+	if Config.SortAscending {
+		semver.Sort(tagNames)
+	}
+
 	r.tags = tagNames
 
 	return nil