RNA: Cleanup PointerRNA struct

The old layout of `PointerRNA` was confusing for historic reasons:
```
typedef struct PointerRNA {
  struct {
    void *data;
  } id;

  struct StructRNA *type;
  void *data;
} PointerRNA;
```

This patch updates it to:
```
typedef struct PointerRNA {
  struct ID *owner_id;
  struct StructRNA *type;
  void *data;
} PointerRNA;
```

Throughout the code base `id.data` was replaced with `owner_id`.
Furthermore, many explicit pointer type casts were added which
were implicit before. Some type casts to `ID *` were removed.

Reviewers: brecht, campbellbarton

Differential Revision: https://developer.blender.org/D5558

1 files changed, 1 insertions, 1 deletions

diff --git a/source/blender/makesrna/intern/rna_lightprobe.c b/source/blender/makesrna/intern/rna_lightprobe.c
index a8b95036e02..463cefdf3f0 100644
--- a/source/blender/makesrna/intern/rna_lightprobe.c
+++ b/source/blender/makesrna/intern/rna_lightprobe.c
@@ -43,7 +43,7 @@
 
 static void rna_LightProbe_recalc(Main *UNUSED(bmain), Scene *UNUSED(scene), PointerRNA *ptr)
 {
-  DEG_id_tag_update(ptr->id.data, ID_RECALC_GEOMETRY);
+  DEG_id_tag_update(ptr->owner_id, ID_RECALC_GEOMETRY);
 }
 
 #else