lib-sieve: sieve-binary - Use int for sieve_binary_open() status result

src/lib-sieve/sieve-binary-file.c

src/lib-sieve/sieve-binary.h

src/lib-sieve/sieve.c

src/lib-sieve/storage/dict/sieve-dict-script.c

src/lib-sieve/storage/file/sieve-file-script.c

src/lib-sieve/storage/ldap/sieve-ldap-script.c