Fix copy-paste issue

Author: mborland

include/boost/int128/cstdlib.hpp

@@ -76,7 +76,7 @@ constexpr i128div_t div(const int128_t x, const int128_t y) noexcept
     const auto unsigned_res {div(abs_lhs, abs_rhs)};
 
 
-    const auto negative_quot {(lhs.high < 0) != (rhs.high < 0)};
+    const auto negative_quot {(x.high < 0) != (y.high < 0)};
     #if defined(_MSC_VER) && !defined(__GNUC__)
     const auto negative_rem {static_cast<bool>(x.high < 0)};
     #else