support usage of headers within C++

added missing extern "C" to support usage of the header within C++

ftpd.h

@@ -34,6 +34,15 @@
 #ifndef __FTPD_H__
 #define __FTPD_H__
 
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
 void ftpd_init(void);
 
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
 #endif				/* __FTPD_H__ */

vfs.h

@@ -1,4 +1,4 @@
-/* Copyright (c) 2013, Philipp Tölke
+/* Copyright (c) 2013, Philipp T�lke
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -27,6 +27,11 @@
 #ifndef INCLUDE_VFS_H
 #define INCLUDE_VFS_H
 
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
 #include <source/ff.h>
 #include <stddef.h>
 #include <stdlib.h>
@@ -86,4 +91,8 @@ void vfs_closedir(vfs_dir_t* dir);
 vfs_dir_t* vfs_opendir(vfs_t* vfs, const char* path);
 struct tm* gmtime(const time_t *c_t);
 
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
 #endif /* INCLUDE_VFS_H */