(raptor_turtle_emit_subject): check raptor_avltree_iterator_next() return [coverity CID 29234]
(raptor_grddl_run_grddl_transform_doc): Check parse start/chunk returns [coverity CID 29235]
(raptor_rss10_emit_rdfxml_item_triples): Remove logically dead code [coverity CID 29237]

No need to test freeing serializer twice.
(raptor_grddl_parse_chunk): Remove logically dead code [coverity CID 29239]

loop is always 0 or 1 so don't check for other values.
(rdfa_complete_current_property_value_triples): Remove duplicate variable [coverity CID 29240]
(raptor_log_error_varargs): Allow world to be NULL [coverity CID 29241]
(raptor_log_error): Allow world to be NULL [coverity CID 29241]
(raptor_grddl_run_xpath_match): Check if uri_string is not NULL [coverity CID 29243]
(raptor_xml_writer_start_element_common): nstack [coverity CID 29244]

(raptor_xml_writer_start_element_common): Defining xml language declaration
requires namespace declarations so add nstack check.
(raptor_rss10_emit_rdfxml_item_triples): Free root_qname in logical place [coverity CID 29236]
(raptor_rdfxml_serialize_statement): Remove always 0 end_predicate_element [coverity CID 29238]
(rdfa_complete_object_literal_triples) strchr on NULL [coverity CID 29429]

(rdfa_complete_object_literal_triples): Need non NULL
context->xml_literal to do strchr() on it [coverity CID 29429]
rdfa requires a base URI [coverity CID 29250]

(raptor_librdfa_parse_start): Add check for base URI

(raptor_librdfa_parser_register_factory): Mark 'rdfa' parser needs a
base URI.