Bad mt-pth code generation

This failure is in the apex Ancillary/benchmks/UnitTests/UTCatenate test, while running make.

[ 54%] Building UTCatenate.unittest.sac program for target `mt_pth'
[ 54%] Built target mt_pth-module-UTCatenate
/home/apex/apexgit/Ancillary/benchmks/UnitTests/build/UTCatenate-mt_pth.c: In function ‘SACf__MAIN_CL_ST___mtspmdf_53698_main__bl_26__bl__bl’:
/home/apex/apexgit/Ancillary/benchmks/UnitTests/build/UTCatenate-mt_pth.c:9558:89: warning: implicit declaration of function ‘NONE’ [-Wimplicit-function-declaration]
 9558 |       SAC_MT_SYNC_FOLD_out( SACf__MAIN_CL_ST___mtspmdf_53698_main__bl_26__bl__bl, 1, (SACp_emal_51959__pinl_22603__ea_47__flat_310, (SCL, (NHD, (NUQ, (INT, (GLO, (FPO, (NOT, (NDI, (BOO, )))))))))), (SACp_mtspmdfanon_53696__pinl_22603__ea_47__flat_310, (SCL, (NHD, (NUQ, (INT, (GLO, (NON, (NOT, (NDI, (BOO, )))))))))), bool, ND, NONE);
      |                                                                                         ^~~~
/usr/bin/ld: /tmp/SAC_1RSJBE/UTCatenate-mt_pth.o: in function `SACf__MAIN_CL_ST___mtspmdf_53698_main__bl_26__bl__bl':
/home/apex/apexgit/Ancillary/benchmks/UnitTests/build/UTCatenate-mt_pth.c:9558: undefined reference to `NONE'
collect2: error: ld returned 1 exit status
abort: System failed to execute shell command

sac2c -V
sac2c 1.3.3-MijasCosta-667-g56d30
build-type: RELEASE
built-by: "sac" at 2021-05-26T16:16:09