Fix -Wformat -Werror=format-security errors caused by wrong fprintf calls
See also: https://bugs.gentoo.org/show_bug.cgi?id=577430
* utils_ui.c: In function ‘quick_message’:
* utils_ui.c:192:29: error: format not a string literal and no format arguments [-Werror=format-security]
*                              message);

--- ggobi-2.1.11/src/utils_ui.c
+++ ggobi-2.1.11/src/utils_ui.c
@@ -189,7 +189,7 @@
 
   dialog =
     gtk_message_dialog_new (NULL, 0, GTK_MESSAGE_INFO, GTK_BUTTONS_OK,
-                            message);
+                            "%s", message);
 
   if (modal)
     gtk_window_set_modal (GTK_WINDOW (dialog), true);
--- ggobi-2.1.11/src/write_xml.c
+++ ggobi-2.1.11/src/write_xml.c
@@ -37,14 +37,14 @@
 write_xml_string(FILE *f, gchar *str)
 {
   gchar *fmtstr = g_markup_printf_escaped("%s", str);
-  fprintf(f, fmtstr);
+  fprintf(f, "%s", fmtstr);
   g_free(fmtstr);
 }
 static void
 write_xml_string_fmt(FILE *f, gchar *fmt, gchar *str)
 {
   gchar *fmtstr = g_markup_printf_escaped(fmt, str);
-  fprintf(f, fmtstr);
+  fprintf(f, "%s", fmtstr);
   g_free(fmtstr);
 }