New ML support - language.c - fixed return origial string for zero length translation

Firmware/language.c

@@ -39,6 +39,8 @@ const char* lang_get_translation(const char* s)
 	uint16_t ui = pgm_read_word(((uint16_t*)s)); //read string id
 	if (ui == 0xffff) return s + 2; //translation not found
 	ui = pgm_read_word(((uint16_t*)(((char*)lang_table + 16 + ui*2)))); //read relative offset
+	if (pgm_read_byte(((uint8_t*)((char*)lang_table + ui))) == 0)
+		return s + 2;//not translated string
 	return (const char*)((char*)lang_table + ui); //return calculated pointer
 }