pgsql: Silence warning in older versions of Valgrind

Silence warning in older versions of Valgrind Due to misunderstanding on my part, commit 235328ee4 did not go far enough to silence older versions of Valgrind. For those, it was the bit scan that was problematic, not the subsequent bit-masking operation. To fix, use the unaligned path for the trai

pgsql: Silence warning in older versions of Valgrind

Silence warning in older versions of Valgrind Due to misunderstanding on my part, commit 235328ee4 did not go far enough to silence older versions of Valgrind. For those, it was the bit scan that was problematic, not the subsequent bit-masking operation. To fix, use the unaligned path for the trai