Fix for RF OFF during T3TonDH NCI_DATA_MSG handling

Added null check for callback pointer
diff --git a/src/nfa/ce/nfa_ce_act.c b/src/nfa/ce/nfa_ce_act.c
index e1803bd..a487629 100644
--- a/src/nfa/ce/nfa_ce_act.c
+++ b/src/nfa/ce/nfa_ce_act.c
@@ -1212,7 +1212,8 @@
                ) &&
           (i == p_cb->idx_cur_active)) {
         conn_evt.deactivated.type = deact_type;
-        (*p_cb->p_active_conn_cback)(NFA_DEACTIVATED_EVT, &conn_evt);
+      if (p_cb->p_active_conn_cback)
+          (*p_cb->p_active_conn_cback)(NFA_DEACTIVATED_EVT, &conn_evt);
       } else if ((p_cb->activation_params.protocol == NFA_PROTOCOL_ISO_DEP) &&
                  (p_cb->listen_info[i].protocol_mask &
                   NFA_PROTOCOL_MASK_ISO_DEP)) {
@@ -1221,12 +1222,14 @@
               NFA_CE_LISTEN_INFO_T4T_ACTIVATE_PND)) {
           if (i == NFA_CE_LISTEN_INFO_IDX_NDEF) {
             conn_evt.deactivated.type = deact_type;
-            (*p_cb->p_active_conn_cback)(NFA_DEACTIVATED_EVT, &conn_evt);
+            if (p_cb->p_active_conn_cback)
+                (*p_cb->p_active_conn_cback)(NFA_DEACTIVATED_EVT, &conn_evt);
           } else {
             conn_evt.ce_deactivated.handle =
                 NFA_HANDLE_GROUP_CE | ((tNFA_HANDLE)i);
             conn_evt.ce_deactivated.type = deact_type;
-            (*p_cb->p_active_conn_cback)(NFA_CE_DEACTIVATED_EVT, &conn_evt);
+            if (p_cb->p_active_conn_cback)
+                (*p_cb->p_active_conn_cback)(NFA_CE_DEACTIVATED_EVT, &conn_evt);
           }
         }
       } else if ((p_cb->activation_params.protocol == NFA_PROTOCOL_T3T) &&
@@ -1238,12 +1241,14 @@
 #endif
           if (i == NFA_CE_LISTEN_INFO_IDX_NDEF) {
             conn_evt.deactivated.type = deact_type;
-            (*p_cb->p_active_conn_cback)(NFA_DEACTIVATED_EVT, &conn_evt);
+            if (p_cb->p_active_conn_cback)
+                (*p_cb->p_active_conn_cback)(NFA_DEACTIVATED_EVT, &conn_evt);
           } else {
             conn_evt.ce_deactivated.handle =
                 NFA_HANDLE_GROUP_CE | ((tNFA_HANDLE)i);
             conn_evt.ce_deactivated.type = deact_type;
-            (*p_cb->p_active_conn_cback)(NFA_CE_DEACTIVATED_EVT, &conn_evt);
+            if (p_cb->p_active_conn_cback)
+                (*p_cb->p_active_conn_cback)(NFA_CE_DEACTIVATED_EVT, &conn_evt);
           }
 #if (NXP_EXTNS == TRUE)
         }