Transform `rna_armature.c` and `rna_armature.cc` to C++. - `UNUSED(x)` -> `/*x*/` - Explicit casts for ID and void pointers - Explicit casts for 0 enum values No functional changes.
Transform `rna_armature.c` and `rna_armature.cc` to C++. - `UNUSED(x)` -> `/*x*/` - Explicit casts for ID and void pointers - Explicit casts for 0 enum values No functional changes.