Fix compilation on Mac OS

Changelog

@@ -3,6 +3,7 @@
   - BUGFIX: Fix a race condition in folder scanning and torrent downloader
   - BUGFIX: Hide download url column in search results
   - BUGFIX: Fix a crash when scanned directory does not exist
+  - BUGFIX: Fix compilation on Mac OS
 
 * Sun Sep 20 2009 - Christophe Dumez <chris@qbittorrent.org> - v1.5.2
   - BUGFIX: Some torrents were pausing for no reason

src/misc.h

@@ -43,9 +43,14 @@
 #include <QThread>
 
 #ifndef Q_WS_WIN
-#include <sys/vfs.h>
+#ifdef Q_WS_MAC
+  #include <sys/param.h>
+  #include <sys/mount.h>
 #else
-#include <winbase.h>
+  #include <sys/vfs.h>
+#endif
+#else
+  #include <winbase.h>
 #endif
 
 #include <libtorrent/torrent_info.hpp>