fix bug with uninitalized number of rx antennas

lib/src/phy/ue/ue_cell_search.c

@@ -95,7 +95,7 @@ int srslte_ue_cellsearch_init_multi(srslte_ue_cellsearch_t * q, uint32_t max_fra
 {
   int ret = SRSLTE_ERROR_INVALID_INPUTS;
 
-  if (q != NULL) {
+  if (q != NULL && nof_rx_antennas > 0) {
     ret = SRSLTE_ERROR;
     srslte_cell_t cell;
 

srsue/src/phy/phy.cc

@@ -59,6 +59,7 @@ phy::phy() : workers_pool(MAX_WORKERS),
 
 void phy::set_default_args(phy_args_t *args)
 {
+  args->nof_rx_ant          = 1;
   args->ul_pwr_ctrl_en      = false; 
   args->prach_gain          = -1;
   args->cqi_max             = -1;