Removed unecessery indentation in RLC AM write SDU.

lib/src/upper/rlc_am_lte.cc

@@ -330,15 +330,15 @@ void rlc_am_lte::rlc_am_lte_tx::write_sdu(unique_byte_buffer_t sdu, bool blockin
     return;
   }
 
-  if (sdu.get() != NULL) {
+  if (sdu.get() == nullptr) {
+    log->warning("NULL SDU pointer in write_sdu()\n");
+    return;
+  }
+
   if (blocking) {
     // block on write to queue
-      log->info_hex(sdu->msg,
-                    sdu->N_bytes,
-                    "%s Tx SDU (%d B, tx_sdu_queue_len=%d)\n",
-                    RB_NAME,
-                    sdu->N_bytes,
-                    tx_sdu_queue.size());
+    log->info_hex(
+        sdu->msg, sdu->N_bytes, "%s Tx SDU (%d B, tx_sdu_queue_len=%d)\n", RB_NAME, sdu->N_bytes, tx_sdu_queue.size());
     tx_sdu_queue.write(std::move(sdu));
   } else {
     // non-blocking write
@@ -358,9 +358,6 @@ void rlc_am_lte::rlc_am_lte_tx::write_sdu(unique_byte_buffer_t sdu, bool blockin
                     tx_sdu_queue.size());
     }
   }
-  } else {
-    log->warning("NULL SDU pointer in write_sdu()\n");
-  }
 }
 
 void rlc_am_lte::rlc_am_lte_tx::discard_sdu(uint32_t discard_sn)