[dia] Quick typo fix for broken build

[Zander <zbrown src gnome org>]

commit b41565f12d99fba25ee5c5d6a0a1c58df04fdef1
Author: Zander Brown <zbrown gnome org>
Date:   Sun Jun 9 23:34:14 2019 +0100

    Quick typo fix for broken build
    
    Fixes the main problem in https://gitlab.gnome.org/GNOME/dia/issues/409#note_527719

 app/sheet-editor/sheets_dialog_callbacks.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/app/sheet-editor/sheets_dialog_callbacks.c b/app/sheet-editor/sheets_dialog_callbacks.c
index 5a40bb6f..849eff6b 100644
--- a/app/sheet-editor/sheets_dialog_callbacks.c
+++ b/app/sheet-editor/sheets_dialog_callbacks.c
@@ -711,7 +711,7 @@ on_sheets_new_dialog_button_ok_clicked (GtkButton       *button,
   table_sheets = lookup_widget (sheets_dialog, "table_sheets");
   wrapbox = g_object_get_data (G_OBJECT (table_sheets), "active_wrapbox");
 
-  active_type = (SheetsNewDialogType)g _object_get_data (G_OBJECT (button),
+  active_type = (SheetsNewDialogType) g_object_get_data (G_OBJECT (button),
                                                          "active_type");
   g_assert (active_type);