[gnc-report.cpp] hide gnc_reports impl, expose gnc_reports_foreach

Instead of retrieving the GHashTable and iterating through the
key/values, expose gnc_reports_foreach which does the same job.

gnucash/gnome/dialog-report-style-sheet.cpp

@@ -110,13 +110,9 @@ gnc_style_sheet_options_apply_cb (GncOptionsDialog * propertybox,
                                   gpointer user_data)
 {
     ss_info * ssi = (ss_info *)user_data;
-    GHashTable *reports = NULL;
     GList *results = NULL, *iter;
 
-    /* FIXME: shouldn't be global */
-    reports = gnc_reports_get_global ();
-    if (reports)
-        g_hash_table_foreach (reports, dirty_same_stylesheet, ssi->stylesheet);
+    gnc_reports_foreach (dirty_same_stylesheet, ssi->stylesheet);
 
     results = gnc_option_db_commit (ssi->odb);
     for (iter = results; iter; iter = iter->next)

gnucash/report/gnc-report.cpp

@@ -200,11 +200,12 @@ gnc_reports_flush_global(void)
         g_hash_table_foreach_remove(reports, yes_remove, NULL);
 }
 
-GHashTable *
-gnc_reports_get_global(void)
+void
+gnc_reports_foreach (GHFunc func, gpointer user_data)
 {
     gnc_report_init_table();
-    return reports;
+    if (reports)
+        g_hash_table_foreach (reports, func, user_data);
 }
 
 gboolean

gnucash/report/gnc-report.h

@@ -66,7 +66,7 @@ gint gnc_report_add(SCM report);
 
 void gnc_reports_flush_global(void);
 
-GHashTable* gnc_reports_get_global(void);
+void gnc_reports_foreach (GHFunc func, gpointer user_data);
 
 gchar* gnc_get_default_report_font_family(void);