Always use (get)text domain from primary module

src/modules/cache.c

@@ -252,7 +252,6 @@ size_t CacheLoad( vlc_object_t *p_this, const char *dir, module_cache_t **r )
             LOAD_STRING(submodule->psz_capability);
             LOAD_IMMEDIATE(submodule->i_score);
             LOAD_IMMEDIATE(submodule->b_unloadable);
-            LOAD_STRING(submodule->domain);
         }
 
         char *path;
@@ -541,7 +540,6 @@ static int CacheSaveSubmodule( FILE *file, const module_t *p_module )
     SAVE_STRING( p_module->psz_capability );
     SAVE_IMMEDIATE( p_module->i_score );
     SAVE_IMMEDIATE( p_module->b_unloadable );
-    SAVE_STRING( p_module->domain );
     return 0;
 
 error:

src/modules/entry.c

@@ -122,8 +122,8 @@ module_t *vlc_submodule_create (module_t *module)
     submodule->i_config_items = 0;
     submodule->i_bool_items = 0;
     /*submodule->handle = unused*/
-    submodule->psz_filename = NULL;
-    submodule->domain = module->domain;
+    /*submodule->psz_filename unused */
+    submodule->domain = NULL;
     return submodule;
 }
 

src/modules/modules.c

@@ -267,11 +267,13 @@ int module_get_score( const module_t *m )
  */
 const char *module_gettext (const module_t *m, const char *str)
 {
-#ifdef ENABLE_NLS
-    const char *domain = m->domain ? m->domain : PACKAGE_NAME;
+    if (m->parent != NULL)
+        m = m->parent;
     if (unlikely(str == NULL || *str == '\0'))
         return "";
-    return dgettext (domain, str);
+#ifdef ENABLE_NLS
+    const char *domain = m->domain;
+    return dgettext ((domain != NULL) ? domain : PACKAGE_NAME, str);
 #else
     (void)m;
     return str;