Daniel Black 9059385262 MDEV-37048 revert MSAN my_vsnprintf_ex for double workaround ...

5 years ago e843033d02 worked around a
MSAN bug when retrieving a double from a va_list.

The construct {{__msan_check_mem_is_initialized(ap,size)}} where ap
is a va_list is undefined as {{__msan_check_mem_is_initialized}}
expects a pointer. The implementation detail of va_list is architecture
dependant and on aarch64 this isn't a pointer.

The need to any msan action is no unnecessary since this has been
corrected in recent clang versions.

As such the additions from e843033d02
have been reverted.

Tested with clang-20.1 and the test cases from MDEV-22690 and
MDEV-22691.

2025-07-03 10:43:40 +03:00

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