Clear the reminder of the origin file name of textures in Track::cleanup().

src/graphics/irr_driver.cpp

@@ -1438,6 +1438,14 @@ video::ITexture *IrrDriver::getTexture(const std::string &filename,
     return out;
 }   // getTexture
 
+// ----------------------------------------------------------------------------
+/** Clear the texture-filename reminder.
+*/
+void IrrDriver::clearTexturesFileName()
+{
+    m_texturesFileName.clear();
+} // clearTexturesFileName
+
 // ----------------------------------------------------------------------------
 /** Get the texture file name using a texture pointer.
 *   \param tex Pointer on the texture for which we want to find the file name.

src/graphics/irr_driver.hpp

@@ -309,6 +309,7 @@ public:
                                      bool is_premul=false,
                                      bool is_prediv=false,
                                      bool complain_if_not_found=true);
+    void                  clearTexturesFileName();
     std::string           getTextureName(video::ITexture* tex);
     void                  grabAllTextures(const scene::IMesh *mesh);
     void                  dropAllTextures(const scene::IMesh *mesh);

src/tracks/track.cpp

@@ -207,8 +207,10 @@ void Track::cleanup()
     ItemManager::destroy();
 
     ParticleKindManager::get()->cleanUpTrackSpecificGfx();
-    // Clear remainder of transformed textures
+    // Clear reminder of transformed textures
     resetTextureTable();
+    // Clear reminder of the link between textures and file names.
+    irr_driver->clearTexturesFileName();
 
     for(unsigned int i=0; i<m_animated_textures.size(); i++)
     {