Python: Raise an error even NO_MAIN data is assigned to object

The goal is to prevent assignment of temporary or evaluated meshes
to objects from the main database.

Majority of the change is actually related on passing reports around.

On a positive side there are more error prints which can become more
visible to scripters.

There are still possible further improvements in the related areas.
For example, disable user counting for evaluated ID datablocks when
assignment happens. But can also happen later on as a separate
improvement.

Reviewers: brecht, campbellbarton, mont29

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D4884

1 files changed, 5 insertions, 2 deletions

diff --git a/source/blender/makesrna/intern/rna_gpencil_modifier.c b/source/blender/makesrna/intern/rna_gpencil_modifier.c
index d1ae46a74f7..afefa66e2ae 100644
--- a/source/blender/makesrna/intern/rna_gpencil_modifier.c
+++ b/source/blender/makesrna/intern/rna_gpencil_modifier.c
@@ -296,7 +296,8 @@ static void greasepencil_modifier_object_set(Object *self,
 }
 
 #  define RNA_GP_MOD_OBJECT_SET(_type, _prop, _obtype) \
-    static void rna_##_type##GpencilModifier_##_prop##_set(PointerRNA *ptr, PointerRNA value) \
+    static void rna_##_type##GpencilModifier_##_prop##_set( \
+        struct ReportList *UNUSED(reports), PointerRNA *ptr, PointerRNA value) \
     { \
       _type##GpencilModifierData *tmd = (_type##GpencilModifierData *)ptr->data; \
       greasepencil_modifier_object_set(ptr->id.data, &tmd->_prop, _obtype, value); \
@@ -308,7 +309,9 @@ RNA_GP_MOD_OBJECT_SET(Mirror, object, OB_EMPTY);
 
 #  undef RNA_GP_MOD_OBJECT_SET
 
-static void rna_HookGpencilModifier_object_set(PointerRNA *ptr, PointerRNA value)
+static void rna_HookGpencilModifier_object_set(struct ReportList *UNUSED(reports),
+                                               PointerRNA *ptr,
+                                               PointerRNA value)
 {
   HookGpencilModifierData *hmd = ptr->data;
   Object *ob = (Object *)value.data;