sched,nr: handle case of ssb_periodicity not given

If the parameter ssb_periodicity is not given by higher layers,
the function needs to handle this case. The parameters could be
passed with 0 value, which makes the function crash.

For the time being, if ssb_periodicity is not given, the std value
5 ms will be used.

Signed-off-by: Carlo Galiotto <carlo@srs.io>

srsenb/src/stack/mac/nr/sched_nr_signalling.cc

@@ -17,6 +17,8 @@
 #define POS_IN_BURST_THIRD_BIT_IDX  2
 #define POS_IN_BURST_FOURTH_BIT_IDX  3
 
+#define DEFAULT_SSB_PERIODICITY 5
+
 namespace srsenb {
 namespace sched_nr_impl {
 
@@ -47,6 +49,9 @@ void sched_ssb_basic(const slot_point&  sl_point, uint32_t ssb_periodicity, ssb_
    * 3) Position in Burst 1000
    * */
 
+  if (ssb_periodicity == 0)
+    ssb_periodicity = DEFAULT_SSB_PERIODICITY;
+
   uint32_t sl_idx = sl_point.to_uint();
   uint32_t ssb_sf_idx = sl_point.to_uint() % ssb_periodicity;