[goffice] GOFormat: simplify palette api.

[Morten Welinder <mortenw src gnome org>]

commit a2e38fd5a89bcfd6ae5e79f1296aef3046a9c78e
Author: Morten Welinder <terra gnome org>
Date:   Sun Mar 30 11:31:28 2014 -0400

    GOFormat: simplify palette api.

 goffice/utils/go-format.c |   14 ++++++++++----
 goffice/utils/go-format.h |    2 +-
 2 files changed, 11 insertions(+), 5 deletions(-)
---
diff --git a/goffice/utils/go-format.c b/goffice/utils/go-format.c
index 5d6fa56..52b9723 100644
--- a/goffice/utils/go-format.c
+++ b/goffice/utils/go-format.c
@@ -820,8 +820,15 @@ color_dist (GOColor c1, GOColor c2)
        return dr * dr + dg * dg + db * db;
 }
 
+/**
+ * go_format_palette_index_from_color:
+ * @c: color
+ *
+ * Returns: the index of the color closest to the argument color in some
+ * sense.
+ */
 int
-go_format_palette_index_from_color (GOColor c, gboolean *exact)
+go_format_palette_index_from_color (GOColor c)
 {
        int mindist = G_MAXINT;
        unsigned ui;
@@ -833,12 +840,11 @@ go_format_palette_index_from_color (GOColor c, gboolean *exact)
                if (d < mindist) {
                        mindist = d;
                        res = ui;
+                       if (d == 0)
+                               break;
                }
        }
 
-       if (exact)
-               *exact = (mindist == 0);
-
        return res;
 }
 
diff --git a/goffice/utils/go-format.h b/goffice/utils/go-format.h
index 5eec5e0..e7791e6 100644
--- a/goffice/utils/go-format.h
+++ b/goffice/utils/go-format.h
@@ -280,7 +280,7 @@ GOFormatCurrency const *go_format_locale_currency (void);
 /*************************************************************************/
 
 GOColor go_format_palette_color_of_index (int i);
-int go_format_palette_index_from_color (GOColor c, gboolean *exact);
+int go_format_palette_index_from_color (GOColor c);
 char *go_format_palette_name_of_index (int i);
 
 /*************************************************************************/