RNA: make template_list list_id a required arg

Prepare for keyword only args.

1 files changed, 2 insertions, 1 deletions

diff --git a/source/blender/makesrna/intern/rna_ui_api.c b/source/blender/makesrna/intern/rna_ui_api.c
index 9c825f3b158..bafc7dc69c1 100644
--- a/source/blender/makesrna/intern/rna_ui_api.c
+++ b/source/blender/makesrna/intern/rna_ui_api.c
@@ -1006,10 +1006,11 @@ void RNA_api_ui_layout(StructRNA *srna)
 	parm = RNA_def_string(func, "list_id", NULL, 0, "",
 	                      "Identifier of this list widget (mandatory when using default \"" UI_UL_DEFAULT_CLASS_NAME
 	                      "\" class). "
-	                      "If this is set, the uilist gets a custom ID, otherwise it takes the "
+	                      "If this not an empty string, the uilist gets a custom ID, otherwise it takes the "
 	                      "name of the class used to define the uilist (for example, if the "
 	                      "class name is \"OBJECT_UL_vgroups\", and list_id is not set by the "
 	                      "script, then bl_idname = \"OBJECT_UL_vgroups\")");
+	RNA_def_parameter_flags(parm, 0, PARM_REQUIRED);
 	parm = RNA_def_pointer(func, "dataptr", "AnyType", "", "Data from which to take the Collection property");
 	RNA_def_parameter_flags(parm, 0, PARM_REQUIRED | PARM_RNAPTR);
 	parm = RNA_def_string(func, "propname", NULL, 0, "", "Identifier of the Collection property in data");