compile warning for esp8266

Author: pschatzmann

src/helix_pgm.h

@@ -1,11 +1,11 @@
 #pragma once
 
-#if defined(ARDUINO) && __has_include(<pgm_space>)
-#include <pgm_space.h>
+#ifdef ESP8266
+#  include "pgmspace.h"
+#elif defined(ARDUINO) && __has_include(<pgm_space.h>)
+#  include <pgm_space.h>
 #else
-
-#define PROGMEM
-#define pgm_read_byte(addr) (*(const unsigned char *)(addr))
-#define pgm_read_word(addr) (*(const unsigned short *)(addr))
-
+#  define PROGMEM
+#  define pgm_read_byte(addr) (*(const unsigned char *)(addr))
+#  define pgm_read_word(addr) (*(const unsigned short *)(addr))
 #endif