fix(ptrace): resolve OverflowError on riscv64 FTBFS#93
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Replace the signed c_long conversion with unsigned comparison against c_ulong(-1), as _ptrace.restype is already c_ulong. Large unsigned ptrace return values (which is common on riscv64) were overflowing the signed conversion. Fixes #1087588
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Replace the signed c_long conversion with unsigned comparison against c_ulong(-1), as _ptrace.restype is already c_ulong. Large unsigned ptrace return values (which is common on riscv64) were overflowing the signed conversion.
Fixes #1087588