vector_algorithms.cpp: avoid unaligned access
#5760
Merged
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Fixes #5741
The unaligned access here could happen without misalignment from the user side: the original arrays could be of a type with a smaller alignment.
I have not found other instances of unaligned access due to integral cast
vector_algorithms.cpp: avoid cast to integral in__std_bitset_from_string_N#5759 is different as it only was unaligned access when the bitset itself is unaligned, so there the user is to blame