[bug] Can't save anymore detector data under AppleM1.

[andreafarina]

After the upgrade of photon-sharing under GPU I can't run anymore simulations with cfg.issaveexit = 1.
Here is the output:

• variant name: [MMC-OpenCL] compiled with OpenCL version [1]
• compiled with: [RNG] xorshift128+ RNG [Seed Length] 4
  initializing streams ... init complete : 0 ms
  Building kernel with option: -cl-mad-enable -DMCX_USE_NATIVE -DMCX_SIMPLIFY_BRANCH -DMCX_VECTOR_INDEX -DMCX_SRC_PENCIL -DUSE_ATOMIC -DMCX_SAVE_DETECTORS -DMCX_SAVE_SEED -DUSE_BLBADOUEL
  Kernel build log:
  program_source:489:19: warning: comparison of integers of different signs: '__private uint' (aka '__private unsigned int') and '__private int' [-Wsign-compare]
  for (i = 0; i < len; i++) {
  ~ ^ ~~~
  program_source:611:16: warning: comparison of integers of different signs: '__private int' and '__constant uint' (aka '__constant unsigned int') [-Wsign-compare]
  if (r->eid <= GPU_PARAM(gcfg, normbuf)) {
  ~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~
  program_source:648:105: warning: comparison of integers of different signs: 'int' and 'unsigned int' [-Wsign-compare]
  if ((int)((r->photontimer + r->Lmove * (prop.n * R_C0) - gcfg->tstart)*GPU_PARAM(gcfg, Rtstep)) > GPU_PARAM(gcfg, maxgate) - 1) { /exit time window/
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  program_source:681:22: warning: comparison of integers of different signs: 'int' and 'unsigned int' [-Wsign-compare]
  tshift = MIN( ((int)(replaytime[r->photonid] * GPU_PARAM(gcfg, Rtstep))), GPU_PARAM(gcfg, maxgate) - 1 ) * GPU_PARAM(gcfg, framelen);
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  program_source:272:32: note: expanded from macro 'MIN'
  #define MIN(a,b) ((a)<(b)?(a):(b))
  ~ ^ ~
  program_source:683:22: warning: comparison of integers of different signs: 'int' and 'unsigned int' [-Wsign-compare]
  tshift = MIN( ((int)((r->photontimer - gcfg->tstart) * GPU_PARAM(gcfg, Rtstep))), GPU_PARAM(gcfg, maxgate) - 1 ) * GPU_PARAM(gcfg, framelen);
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  program_source:272:32: note: expanded from macro 'MIN'
  #define MIN(a,b) ((a)<(b)?(a):(b))
  ~ ^ ~
  program_source:1477:15: error: casting '__local float *' to type '__private uint *' (aka '__private unsigned int *') changes address space of pointer
  ((uint)(ppath + GPU_PARAM(gcfg, reclen) - 1)) = r.posidx;
  ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  program_source:1645:71: warning: comparison of integers of different signs: '__global int' and 'unsigned int' [-Wsign-compare]
  if (GPU_PARAM(gcfg, isextdet) && type[oldeid - 1] == GPU_PARAM(gcfg, maxmedia) + 1) {
  ~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

MMCLAB ERROR (11): Error: Failed to build program executable! in unit mmc_cl_host.c:498
Error from thread (0): Error: Failed to build program executable!
done 169
C++ Error: MMCLAB Terminated due to exception!

Thanks a lot!
Regards

Andrea