[libgames-support] Simplify scores directory creation code

[Michael Catanzaro <mcatanzaro src gnome org>]

commit f8b86c6b2c71986d4bafab78db0f961f64401e70
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Sun Sep 20 17:27:43 2015 -0500

    Simplify scores directory creation code
    
    No point in checking if it already exists. Also, let's report a real
    error if this somehow fails.

 games/scores/context.vala |    7 ++-----
 1 files changed, 2 insertions(+), 5 deletions(-)
---
diff --git a/games/scores/context.vala b/games/scores/context.vala
index 5885075..425d9e1 100644
--- a/games/scores/context.vala
+++ b/games/scores/context.vala
@@ -181,12 +181,9 @@ public class Context : Object
 
     private async void save_score_to_file (Score score, Category category) throws Error
     {
-        if (!FileUtils.test (user_score_dir, FileTest.EXISTS))
+        if (DirUtils.create_with_parents (user_score_dir, 0766) == -1)
         {
-            if (DirUtils.create_with_parents (user_score_dir, 0766) == -1)
-            {
-                throw new FileError.FAILED ("Error: Could not create directory.");
-            }
+            throw new FileError.FAILED ("Failed to create %s: %s", user_score_dir, strerror (errno));
         }
 
         var file = File.new_for_path (Path.build_filename (user_score_dir, category.key));