Apply @SuGlider suggestions from code review

Co-authored-by: Rodrigo Garcia <[email protected]>

Author: P-R-O-C-H-Y

libraries/ESP_NOW/src/ESP32_NOW_Serial.cpp

@@ -27,10 +27,10 @@ ESP_NOW_Serial_Class::~ESP_NOW_Serial_Class(){
 
 size_t ESP_NOW_Serial_Class::setTxBufferSize(size_t tx_queue_len){
     if(tx_ring_buf){
-        if(!tx_queue_len){
-            vRingbufferDelete(tx_ring_buf);
-            tx_ring_buf = NULL;
-        }
+        vRingbufferDelete(tx_ring_buf);
+        tx_ring_buf = NULL;
+    }
+    if(!tx_queue_len){
         return 0;
     }
     tx_ring_buf = xRingbufferCreate(tx_queue_len, RINGBUF_TYPE_BYTEBUF);
@@ -42,10 +42,10 @@ size_t ESP_NOW_Serial_Class::setTxBufferSize(size_t tx_queue_len){
 
 size_t ESP_NOW_Serial_Class::setRxBufferSize(size_t rx_queue_len){
     if(rx_queue){
-        if(!rx_queue_len){
-            vQueueDelete(rx_queue);
-            rx_queue = NULL;
-        }
+        vQueueDelete(rx_queue);
+        rx_queue = NULL;
+    }
+    if(!rx_queue_len){
         return 0;
     }
     rx_queue = xQueueCreate(rx_queue_len, sizeof(uint8_t));