Add missing curlies

Author: kevinsawicki

app/src/main/java/com/github/mobile/util/AvatarLoader.java

@@ -167,9 +167,10 @@ protected BitmapDrawable fetchAvatar(final String url,
         File userAvatarDir = new File(avatarDir, userId);
         if (userAvatarDir.isDirectory())
             deleteCachedUserAvatars(userAvatarDir);
-        else
+        else {
             userAvatarDir.delete();
             userAvatarDir.mkdirs();
+        }
 
         File rawAvatar = new File(userAvatarDir, cachedAvatarFilename + "-raw");
         HttpRequest request = HttpRequest.get(url);