Fix object copying not ensuring validity of material arrays.
Related to T56363, this is not fixing the root of the bug, but ID copying should always be a good occasion to ensure sanity of our data (and error checking is always better than a crash!).
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@ -1124,6 +1124,12 @@ void BKE_object_copy_data(Main *UNUSED(bmain), Object *ob_dst, const Object *ob_
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ob_dst->matbits = MEM_dupallocN(ob_src->matbits);
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ob_dst->totcol = ob_src->totcol;
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}
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else if (ob_dst->mat != NULL || ob_dst->matbits != NULL) {
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/* This shall not be needed, but better be safe than sorry. */
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BLI_assert(!"Object copy: non-NULL material pointers with zero counter, should not happen.");
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ob_dst->mat = NULL;
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ob_dst->matbits = NULL;
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}
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if (ob_src->iuser) ob_dst->iuser = MEM_dupallocN(ob_src->iuser);
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