til_settings: add an optional til_settings_t.prefix

Preparatory commit for bridging the gap separating a baked
til_setup_t from a runtime-populated descendant til_settings_t
like modules::rtv produces for its channels via
til_module_setup_randomize().

For these currently orphaned til_settings_t instances we don't
readily have access to the logical ancestor til_settings_t that
was used to produce the module_context's bound til_setup_t.  But
we don't really need the ancestor til_settings_t, all we _really_
want is the ancestral path to prefix the orphan til_settings_t
instances.

So this commit introduces supplying a prefix which gets prepended
to paths printed via the settings instance.  A later commit will
make use of this in modules::rtv when producing the settings
instance passed to til_module_setup_randomize()

1 files changed, 2 insertions, 2 deletions

diff --git a/src/til.c b/src/til.c
index b9ccde0..6054014 100644
--- a/src/til.c
+++ b/src/til.c
@@ -374,7 +374,7 @@ int til_module_setup_randomize(const til_module_t *module, unsigned seed, til_se
 	 *    other state to indicate which ones should always be randomized vs. ones which were
 	 *    explicitly specified to stay fixed.
 	 */
-	settings = til_settings_new(NULL, module->name, NULL);
+	settings = til_settings_new(NULL, NULL, module->name, NULL);
 	if (!settings)
 		return -ENOMEM;
 
@@ -442,7 +442,7 @@ int til_module_setup_randomize(const til_module_t *module, unsigned seed, til_se
 						break;
 				}
 
-				setting->value_as_nested_settings = til_settings_new(desc->container, desc->spec.key ? : label, setting->value);
+				setting->value_as_nested_settings = til_settings_new(NULL, desc->container, desc->spec.key ? : label, setting->value);
 				free(label);
 
 				if (!setting->value_as_nested_settings) {