Only check the calculation of the minimal neighbour time-bin if we are not...

Only check the calculation of the minimal neighbour time-bin if we are not using vectorization. This feature is not used in the Gadget-SPH SIMD code.

src/timestep_limiter.h

@@ -46,8 +46,10 @@ timestep_limiter_prepare_force(struct part *restrict p,
 __attribute__((always_inline)) INLINE static void timestep_limiter_end_force(
     struct part *restrict p) {
 #ifdef SWIFT_DEBUG_CHECKS
+#ifndef WITH_VECTORIZATION
   if (p->time_bin > 0 && p->limiter_data.min_ngb_time_bin == num_time_bins + 1)
     error("Minimal time-bin not computed!");
+#endif
   if (p->limiter_data.min_ngb_time_bin == 0)
     error("Minimal time-bin of neighbours is 0");
 #endif