message: [lldb-vscode] Fix warning
  I changed the variable to an unsigned to get rid of a signed and
  unsigned compare without realizing the value could be negative. This
  fixes the assert instead.
diff: @@ -95,7 +95,7 @@ bool InputStream::read_full(std::ofstream *log, size_t length,
  char *ptr = &data[0];
  while (length != 0) {
  - size_t bytes_read = 0;
  + int bytes_read = 0;
  if (descriptor.m_is_socket)
  bytes_read = ::recv(descriptor.m_socket, ptr, length, 0);
  else
  @@ -119,7 +119,7 @@ bool InputStream::read_full(std::ofstream *log, size_t length,
  return false;
  }
  - assert(bytes_read <= length);
  + assert(bytes_read >= 0 && (size_t)bytes_read <= length);
  ptr += bytes_read;
  length -= bytes_read;
  }
  