cygwin: initialize variable for stack unwinding
The third argument of RtlLookupFunctionEntry actually is documented as _Inout_opt_ for both x64 and ARM, although generic doc says _Out_ only. * exceptions.cc (__unwind_single_frame): Initialize hist variable.
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@ -280,7 +280,7 @@ __unwind_single_frame (PCONTEXT ctx)
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{
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PRUNTIME_FUNCTION f;
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ULONG64 imagebase;
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UNWIND_HISTORY_TABLE hist;
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UNWIND_HISTORY_TABLE hist = {0};
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DWORD64 establisher;
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PVOID hdl;
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