Fix bug with FATFS on esp32 for free space calculation

esp3d/src/modules/filesystem/esp_filesystem.h

@@ -80,10 +80,7 @@ public:
     static void end();
     static size_t totalBytes();
     static size_t usedBytes();
-    static size_t freeBytes()
+    static size_t freeBytes();
-    {
-        return totalBytes()-usedBytes();
-    };
     static size_t max_update_size();
     static const char * FilesystemName();
     static bool format();

esp3d/src/modules/filesystem/flash/fat_esp32_filesystem.cpp

@@ -38,6 +38,11 @@ void ESP_FileSystem::end()
     _started = false;
 }
 
+size_t ESP_FileSystem::freeBytes()
+{
+    return FFat.freeBytes();
+}
+
 size_t ESP_FileSystem::totalBytes()
 {
     return FFat.totalBytes();

esp3d/src/modules/filesystem/flash/littlefs_esp8266_filesystem .cpp

@@ -38,6 +38,11 @@ void ESP_FileSystem::end()
     LittleFS.end();
 }
 
+size_t ESP_FileSystem::freeBytes()
+{
+    return totalBytes() - usedBytes();
+}
+
 size_t ESP_FileSystem::totalBytes()
 {
     fs::FSInfo info;

esp3d/src/modules/filesystem/flash/spiffs_esp32_filesystem.cpp

@@ -36,6 +36,11 @@ void ESP_FileSystem::end()
     SPIFFS.end();
 }
 
+size_t ESP_FileSystem::freeBytes()
+{
+    return totalBytes() - usedBytes();
+}
+
 size_t ESP_FileSystem::totalBytes()
 {
     return SPIFFS.totalBytes();

esp3d/src/modules/filesystem/flash/spiffs_esp8266_filesystem.cpp

@@ -36,6 +36,11 @@ void ESP_FileSystem::end()
     SPIFFS.end();
 }
 
+size_t ESP_FileSystem::freeBytes()
+{
+    return totalBytes() - usedBytes();
+}
+
 size_t ESP_FileSystem::totalBytes()
 {
     fs::FSInfo info;