options: remove always true m_obj_list::allow_unknown_entries

Ever instance of m_obj_list is a constant and for all of them, the field
is true. Just remove the field all together.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>

audio/out/ao.c

@@ -120,7 +120,6 @@ static bool get_desc(struct m_obj_desc *dst, int index)
 static const struct m_obj_list ao_obj_list = {
     .get_desc = get_desc,
     .description = "audio outputs",
-    .allow_unknown_entries = true,
     .allow_trailer = true,
     .disallow_positional_parameters = true,
     .use_global_options = true,

filters/user_filters.c

@@ -67,7 +67,6 @@ const struct m_obj_list af_obj_list = {
     .get_desc = get_af_desc,
     .description = "audio filters",
     .allow_disable_entries = true,
-    .allow_unknown_entries = true,
     .check_unknown_entry = check_af_lavfi,
     .print_help_list = print_af_help_list,
     .print_unknown_entry_help = print_af_lavfi_help,
@@ -124,7 +123,6 @@ const struct m_obj_list vf_obj_list = {
     .get_desc = get_vf_desc,
     .description = "video filters",
     .allow_disable_entries = true,
-    .allow_unknown_entries = true,
     .check_unknown_entry = check_vf_lavfi,
     .print_help_list = print_vf_help_list,
     .print_unknown_entry_help = print_vf_lavfi_help,

options/m_option.c

@@ -3217,9 +3217,7 @@ static int parse_obj_settings(struct mp_log *log, struct bstr opt, int op,
     } else {
         char name[80];
         snprintf(name, sizeof(name), "%.*s", BSTR_P(str));
-        if (!list->allow_unknown_entries ||
-            (list->check_unknown_entry && !list->check_unknown_entry(name)))
-        {
+        if (list->check_unknown_entry && !list->check_unknown_entry(name)) {
             mp_err(log, "Option %.*s: %.*s doesn't exist.\n",
                    BSTR_P(opt), BSTR_P(str));
             return M_OPT_INVALID;

options/m_option.h

@@ -145,9 +145,6 @@ struct m_obj_list {
     const char *aliases[5][2];
     // Allow a trailing ",", which adds an entry with name=""
     bool allow_trailer;
-    // Allow unknown entries, for which a dummy entry is inserted, and whose
-    // options are skipped and ignored.
-    bool allow_unknown_entries;
     // Callback to test whether an unknown entry should be allowed. (This can
     // be useful if adding them as explicit entries is too much work.)
     bool (*check_unknown_entry)(const char *name);

video/out/vo.c

@@ -211,7 +211,6 @@ const struct m_obj_list vo_obj_list = {
         {"opengl-cb", "libmpv"},
         {0}
     },
-    .allow_unknown_entries = true,
     .allow_trailer = true,
     .disallow_positional_parameters = true,
     .use_global_options = true,