Compile fix for changes in Dovecot.

src/sieve-bin/mail-raw.c

src/sieve-bin/mail-raw.h

src/sieve-bin/namespaces.c

src/sieve-bin/namespaces.h

src/sieve-bin/sieve-exec.c

src/sieve-bin/sieve-test.c

src/testsuite/mail-raw.c

src/testsuite/mail-raw.h

src/testsuite/namespaces.c

src/testsuite/namespaces.h

src/testsuite/testsuite-common.c

src/testsuite/testsuite-common.h

src/testsuite/testsuite.c