Allow overriding motion path settings.

Motion paths themselves aren't getting saved (not sure if they are
without overrides), but being able to override options makes them
usable even if it's necessary to regenerate every edit session.

Differential Revision: https://developer.blender.org/D13842

source/blender/makesrna/intern/rna_animviz.c

@@ -207,6 +207,8 @@ static void rna_def_animviz_paths(BlenderRNA *brna)
   RNA_def_struct_ui_text(
       srna, "Motion Path Settings", "Motion Path settings for animation visualization");
 
+  RNA_define_lib_overridable(true);
+
   /* Enums */
   prop = RNA_def_property(srna, "type", PROP_ENUM, PROP_NONE);
   RNA_def_property_enum_sdna(prop, NULL, "path_type");
@@ -301,6 +303,8 @@ static void rna_def_animviz_paths(BlenderRNA *brna)
   RNA_def_property_clear_flag(prop, PROP_EDITABLE);
   RNA_def_property_ui_text(
       prop, "Has Motion Paths", "Are there any bone paths that will need updating (read-only)");
+
+  RNA_define_lib_overridable(false);
 }
 
 /* --- */
@@ -312,6 +316,7 @@ void rna_def_animviz_common(StructRNA *srna)
   prop = RNA_def_property(srna, "animation_visualization", PROP_POINTER, PROP_NONE);
   RNA_def_property_flag(prop, PROP_NEVER_NULL);
   RNA_def_property_pointer_sdna(prop, NULL, "avs");
+  RNA_def_property_override_flag(prop, PROPOVERRIDE_OVERRIDABLE_LIBRARY);
   RNA_def_property_ui_text(prop, "Animation Visualization", "Animation data for this data-block");
 }
 
@@ -328,6 +333,7 @@ static void rna_def_animviz(BlenderRNA *brna)
   /* motion path settings (nested struct) */
   prop = RNA_def_property(srna, "motion_path", PROP_POINTER, PROP_NONE);
   RNA_def_property_flag(prop, PROP_NEVER_NULL);
+  RNA_def_property_override_flag(prop, PROPOVERRIDE_OVERRIDABLE_LIBRARY);
   RNA_def_property_struct_type(prop, "AnimVizMotionPaths");
   RNA_def_property_pointer_funcs(prop, "rna_AnimViz_motion_paths_get", NULL, NULL, NULL);
   RNA_def_property_ui_text(prop, "Motion Paths", "Motion Path settings for visualization");