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, 2 insertions, 2 deletions

diff --git a/intern/cycles/blender/blender_util.h b/intern/cycles/blender/blender_util.h
index c9d1dc67e54..3625dd45ae2 100644
--- a/intern/cycles/blender/blender_util.h
+++ b/intern/cycles/blender/blender_util.h
@@ -594,7 +594,7 @@ template<typename K, typename T> class id_map {
 
   T *find(const BL::ID &id)
   {
-    return find(id.ptr.id.data);
+    return find(id.ptr.owner_id);
   }
 
   T *find(const K &key)
@@ -629,7 +629,7 @@ template<typename K, typename T> class id_map {
 
   bool sync(T **r_data, const BL::ID &id)
   {
-    return sync(r_data, id, id, id.ptr.id.data);
+    return sync(r_data, id, id, id.ptr.owner_id);
   }
 
   bool sync(T **r_data, const BL::ID &id, const BL::ID &parent, const K &key)