Merge pull request #2229 from ulion/file_double_cache

Fix: now mp4 file on internet url can be played by dvdplayer by double session support of cache.

diff --cc xbmc/filesystem/CurlFile.cpp
index 1226f57,80c1837..0401808
--- 1/xbmc/filesystem/CurlFile.cpp
--- 2/xbmc/filesystem/CurlFile.cpp
+++ b/xbmc/filesystem/CurlFile.cpp
@@@ -371,9 -376,9 +382,10 @@@ void CCurlFile::CReadState::Disconnect(
  
  CCurlFile::~CCurlFile()
  {
 +  CSingleLock lock(s_hostMapLock);
    Close();
    delete m_state;
+   delete m_oldState;
    g_curlInterface.Unload();
  }