minor building issues on debian testing about tlsdate HOT 2 OPEN

src/tlsdate-helper.c:840:9: error: unknown type name 'x509_cert'; did you mean 'x509_crt'?
  const x509_cert *certificate;
        ^~~~~~~~~
        x509_crt
/usr/include/polarssl/x509_crt.h:100:1: note: 'x509_crt' declared here
x509_crt;
^
src/tlsdate-helper.c:850:3: warning: implicit declaration of function 'x509parse_dn_gets' is invalid in C99 [-Wimplicit-function-declaration]
  x509parse_dn_gets(buf, 1024, &certificate->subject);
  ^
src/tlsdate-helper.c:853:30: error: no member named 'rsa' in 'struct _x509_crt'
  public_key = &certificate->rsa;
                ~~~~~~~~~~~  ^
src/tlsdate-helper.c:984:3: error: unknown type name 'x509_cert'; did you mean 'x509_crt'?
  x509_cert cacert;
  ^~~~~~~~~
  x509_crt
/usr/include/polarssl/x509_crt.h:100:1: note: 'x509_crt' declared here
x509_crt;
^
src/tlsdate-helper.c:990:30: error: use of undeclared identifier 'x509_cert'; did you mean 'x509_crt'?
  memset (&cacert, 0, sizeof(x509_cert));
                             ^
/usr/include/polarssl/x509_crt.h:100:1: note: 'x509_crt' declared here
x509_crt;
^
src/tlsdate-helper.c:1004:17: warning: implicit declaration of function 'x509parse_crtfile' is invalid in C99 [-Wimplicit-function-declaration]
        if (0 > x509parse_crtfile(&cacert, ca_cert_container))
                ^
src/tlsdate-helper.c:1008:17: warning: implicit declaration of function 'x509parse_crtpath' is invalid in C99 [-Wimplicit-function-declaration]
        if (0 > x509parse_crtpath(&cacert, ca_cert_container))
                ^
src/tlsdate-helper.c:1107:3: warning: implicit declaration of function 'x509_free' is invalid in C99 [-Wimplicit-function-declaration]
  x509_free (&cacert);
  ^
4 warnings and 4 errors generated.

src/src_tlsdate_helper-tlsdate-helper.o: In function `check_key_length':
/home/daniel/code/tlsdate/src/tlsdate-helper.c:850: undefined reference to `x509parse_dn_gets'
src/src_tlsdate_helper-tlsdate-helper.o: In function `run_ssl':
/home/daniel/code/tlsdate/src/tlsdate-helper.c:1008: undefined reference to `x509parse_crtpath'
/home/daniel/code/tlsdate/src/tlsdate-helper.c:1004: undefined reference to `x509parse_crtfile'
/home/daniel/code/tlsdate/src/tlsdate-helper.c:1107: undefined reference to `x509_free'
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Makefile:1704: recipe for target 'src/tlsdate-helper' failed