xnee 3.19-9.1 FTBFS on armhf

xnee 3.19-9.1 is stuck in -proposed. It FTBFS on armhf:

libtool: compile: gcc -DHAVE_CONFIG_H -I. -I../.. -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64 -Wdate-time -D_FORTIFY_SOURCE=3 -I../include -g -DUSE_VERBOSE -DNO_BUF_VERBOSE -DHAVE_XOSD -DXNEE_XINPUT_SUPPORT -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -fno-stack-clash-protection -fdebug-prefix-map=/<<PKGBUILDDIR>>=/usr/src/xnee-3.19-9.1 -c xnee_fake.c -fPIC -DPIC -o .libs/xnee_fake.o
xnee_fake.c: In function ‘xnee_type_file’:
xnee_fake.c:809:15: error: implicit declaration of function ‘xnee_check_key’; did you mean ‘xnee_check_true’? [-Werror=implicit-function-declaration]
  809 | if (xnee_check_key (xd)==XNEE_GRAB_DATA)
      | ^~~~~~~~~~~~~~
      | xnee_check_true
xnee_fake.c:811:22: error: implicit declaration of function ‘xnee_handle_rec_key’; did you mean ‘xnee_handle_meta_data’? [-Werror=implicit-function-declaration]
  811 | mode = xnee_handle_rec_key(xd);
      | ^~~~~~~~~~~~~~~~~~~
      | xnee_handle_meta_data
cc1: some warnings being treated as errors
make[4]: *** [Makefile:634: xnee_fake.lo] Error 1
make[4]: Leaving directory '/<<PKGBUILDDIR>>/libxnee/src'
make[3]: *** [Makefile:390: all-recursive] Error 1
make[3]: Leaving directory '/<<PKGBUILDDIR>>/libxnee'
make[2]: *** [Makefile:446: all-recursive] Error 1
make[2]: Leaving directory '/<<PKGBUILDDIR>>'
make[1]: *** [Makefile:378: all] Error 2
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
make: *** [/usr/share/cdbs/1/class/makefile.mk:77: debian/stamp-makefile-build] Error 2
dpkg-buildpackage: error: debian/rules build-arch subprocess returned exit status 2