b69a4380b6
The copy constructors for `animrig::Strip`, `animrig::Slot`, and `animrig::StripKeyframeData` used a `memcpy` call as part of the copy implementation. However, this produced warnings on clang 20. For example: ``` warning: first argument in call to 'memcpy' is a pointer to non-trivially copyable type 'blender::animrig::Strip' [-Wnontrivial-memcall]` ``` These warnings did not reflect any actual bugs, because the underlying DNA structs that those types wrap are in fact trivial. Nevertheless, it's worth fixing the warnings. This fixes the warnings by replacing the uses of `memcpy` with equivalents that amount to a `memcpy` anyway, but which the compiler understands are valid for the types. There was also one additional use of `memcpy` in `Strip::create()` that did not trigger a warning because it operated directly on the underlying DNA struct, but was also unnecessary. This PR also replaces that with a simple assignment. Pull Request: https://projects.blender.org/blender/blender/pulls/137467
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