(raptor_turtle_emit_subject): Free iterator on error path [coverity CID 34617]
(raptor_grddl_run_xpath_match): Free base_uri on error path [coverity CID 34618]
(rdfa_complete_list_triples): Init tmp for error path [coverity CID 36737]
Added coverity[negative_returns] for second use of unichar_len [CID 29257]
Add a default value for yyformat for [coverity CID 10838]
Set yytoken to non-negative value for [coverity CID 29259]