(rasqal_algebra_basic_graph_pattern_to_algebra): dead code elimination [coverity CID 43015]
(rasqal_algebra_filter_graph_pattern_to_algebra): dead code elimination [coverity CID 43016]
(rasqal_algebra_graph_graph_pattern_to_algebra): dead code elimination [coverity CID 43025]
(rasqal_triples_rowsource_read_row): dead code [coverity CID 43028]
(rasqal_project_rowsource_read_row): dead code [coverity CID 43029]
(rasqal_expression_evaluate_datetime_part): dead code [coverity CID 43030]
(rasqal_literal_divide): Dead code [coverity CID 43031]
(rasqal_cmdline_read_results): Error path dead code [coverity CID 43032]
(sparql_skip_c_comment): Simplify and remove dead code [coverity CID 43033]
(rasqal_literal_cast): Handle more failure conditions [coverity CID 48453]