The Linux kernel clears these flags on signal, DF is particularly
dangerous because it would break ABI if a signal happened to occur in
the middle of a memory operation that changed the direction of copy.
Because of how frequently wine uses signals, this is actually fairly
likely to occur inside of a memcpy/memset function.
Shout out to BlinkDagger on Discord who found that we forgot to do this.
Ryan Houdek
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