[gnome-software/wip/rancell/ubuntu-ratings] Convert ratings correctly

[Robert Ancell <rancell src gnome org>]

commit 13bfa60474678edbb7eaa8a59eb6aa4eb1c46704
Author: Robert Ancell <robert ancell canonical com>
Date:   Thu Nov 12 15:13:45 2015 +1300

    Convert ratings correctly

 src/plugins/gs-plugin-ubuntu-reviews.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/src/plugins/gs-plugin-ubuntu-reviews.c b/src/plugins/gs-plugin-ubuntu-reviews.c
index cee24c4..8a75284 100644
--- a/src/plugins/gs-plugin-ubuntu-reviews.c
+++ b/src/plugins/gs-plugin-ubuntu-reviews.c
@@ -21,6 +21,7 @@
 
 #include <config.h>
 
+#include <math.h>
 #include <libsoup/soup.h>
 #include <sqlite3.h>
 #include <json-glib/json-glib.h>
@@ -225,14 +226,15 @@ gs_plugin_ubuntu_review_stats_download (GsPlugin *plugin, GError **error)
                json_reader_read_element (reader, i);
                if (json_reader_is_object (reader)) {
                        const gchar *package_name;
-                       gdouble rating;
+                       gint rating;
 
                        json_reader_read_member (reader, "package_name");
                        package_name = json_reader_get_string_value (reader);
                        json_reader_end_member (reader);
 
                        json_reader_read_member (reader, "ratings_average");
-                       rating = g_ascii_strtod (json_reader_get_string_value (reader), NULL);
+                       /* convert star ratings *->10, **->30, ***->50, ****->70, *****->90 */
+                       rating = round (20 * g_ascii_strtod (json_reader_get_string_value (reader), NULL) - 
10);
                        json_reader_end_member (reader);
                }
                json_reader_end_element (reader);