[script] check that there are pixel displays

The script plugin only works on pixel displays, however there wasn't
any check for this, so if a script-based theme was your default
Plymouth would not fallback to using the text plugin instead.

diff --git a/src/plugins/splash/script/plugin.c b/src/plugins/splash/script/plugin.c
index b35994c1a86042222b4156aaa42a0ee73e8dcedd..4930677eb95d0416be04f622ac9f8e14c6715a67 100644 (file)
--- a/src/plugins/splash/script/plugin.c
+++ b/src/plugins/splash/script/plugin.c
@@ -348,6 +348,12 @@ show_splash_screen (ply_boot_splash_plugin_t *plugin,
 {
   assert (plugin != NULL);
 
+  if (ply_list_get_length (plugin->displays) == 0)
+    {
+      ply_trace ("no pixel displays");
+      return false;
+    }
+
   plugin->loop = loop;
   plugin->mode = mode;