evaluate: consolidate evaluation of symbol range expression

evaluate: consolidate evaluation of symbol range expression

Expand symbol_range to range expression to consolidate evaluation.

I found a bug when testing for negative ranges:

  test.nft:5:16-30: Error: Could not process rule: File exists
                  elements = { 1.1.1.1-1.1.1.0 }
                               ^^^^^^^^^^^^^^^

after this patch, error reporting has been restored:

  test.nft:5:16-30: Error: Range negative size
                  elements = { 1.1.1.1-1.1.1.0 }
                               ^^^^^^^^^^^^^^^

Fixes: 347039f64509 ("src: add symbol range expression to further compact intervals")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>