[goffice] Make GODavaScalarVal compatible with go_data_has_value().

[Jean Bréfort <jbrefort src gnome org>]

commit dc438c55df48db28cfdecee1bfa6d31893d0561b
Author: Jean Brefort <jean brefort normalesup org>
Date:   Mon Apr 13 14:51:31 2015 +0200

    Make GODavaScalarVal compatible with go_data_has_value().

 ChangeLog                     |    5 +++++
 goffice/data/go-data-simple.c |    3 +++
 2 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 65450d6..c35ef94 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2015-04-13  Jean Brefort  <jean brefort normalesup org>
+
+       * goffice/data/go-data-simple.c (go_data_scalar_val_new): ensure that
+       go_data_has_value() returns TRUE if there is a valid number.
+
 2015-04-12  Jean Brefort  <jean brefort normalesup org>
 
        * goffice/graph/gog-axis.c (cb_enable_dim): make manual scale really manual
diff --git a/goffice/data/go-data-simple.c b/goffice/data/go-data-simple.c
index aef5b26..8fc7276 100644
--- a/goffice/data/go-data-simple.c
+++ b/goffice/data/go-data-simple.c
@@ -153,6 +153,9 @@ go_data_scalar_val_new (double val)
 {
        GODataScalarVal *res = g_object_new (GO_TYPE_DATA_SCALAR_VAL, NULL);
        res->val = val;
+       if (go_finite (val))
+               GO_DATA (res)->flags =  GO_DATA_CACHE_IS_VALID | GO_DATA_HAS_VALUE;
+
        return GO_DATA (res);
 }