Optimize FixedIssuesExtension#closed_percent by bypassing issues_progress when all issues are closed (#40798).

Patch by Go MAEDA (@maeda).


git-svn-id: https://svn.redmine.org/redmine/trunk@22881 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/version.rb

@@ -54,6 +54,7 @@ module FixedIssuesExtension
   # Returns the percentage of issues that have been marked as 'closed'.
   def closed_percent
     return 0 if open_count + closed_count == 0
+    return 100 if open_count == 0
 
     issues_progress(false)
   end