PROTON-2426: [C] Fix off by one error in pn_quote_data
PROTON-2426: [C] Fix off by one error in pn_quote_data

apache/qpid-proton,gemmellr/qpid-proton,astitcher/qpid-proton,astitcher/qpid-proton,astitcher/qpid-proton,gemmellr/qpid-proton,astitcher/qpid-proton,apache/qpid-proton,apache/qpid-proton,gemmellr/qpid-proton,gemmellr/qpid-proton,gemmellr/qpid-proton,apache/qpid-proton,astitcher/qpid-proton,apache/qpid-proton,gemmellr/qpid-proton,astitcher/qpid-proton,apache/qpid-proton