message: Make the context record struct access dependent on 32 or 64 bit.
  Use target pointer width to determine 32 or 64 bit system and choose
  either Eip or Rip respectively for getting the program counter.
diff: @@ -340,8 +340,14 @@ cfg_if::cfg_if! {
  Some(info) => info,
  None => return EXCEPTION_CONTINUE_SEARCH,
  };
  + #[cfg(target_pointer_width = "32")]
  + let pc = (*(*exception_info).ContextRecord).Eip as *const u8;
  +
  + #[cfg(target_pointer_width = "64")]
  + let pc = (*(*exception_info).ContextRecord).Rip as *const u8;
  +
  let jmp_buf = info.handle_trap(
  - (*(*exception_info).ContextRecord).Eip as *const u8,
  + pc,
  record.ExceptionCode == EXCEPTION_STACK_OVERFLOW,
  // TODO: fix the signal trap associated to memory access in Windows
  None,
  