Compiler warning in count_trailing_zero_bits

[Eli Zaretskii]

The line in data.c marked below:

  else
    {
      int count;
      for (count = 0;
           count < BITS_PER_BITS_WORD - BITS_PER_ULL;
           count += BITS_PER_ULL)
        {
          if (val & ULLONG_MAX)
            return count + count_trailing_zeros_ll (val);
          val = shift_right_ull (val);
        }

      if (BITS_PER_BITS_WORD % BITS_PER_ULL != 0
          && BITS_WORD_MAX == (bits_word) -1)
 >>>>>  val |= (bits_word) 1 << (BITS_PER_BITS_WORD % BITS_PER_ULL);
      return count + count_trailing_zeros_ll (val);
    }

causes a compiler warning in a 32-bit unoptimized build:

  data.c: In function `count_trailing_zero_bits':
  data.c:3114: warning: left shift count >= width of type

This is result of commit in revision 115095.

I hope it will be possible to prevent this nuisance.