fixed memory leaks

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5813 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/unix/mimetype.h

@@ -36,6 +36,8 @@ public:
     // ctor loads all info into memory for quicker access later on
     // TODO it would be nice to load them all, but parse on demand only...
     wxMimeTypesManagerImpl();
+    ~wxMimeTypesManagerImpl();
+    
 
     // implement containing class functions
     wxFileType *GetFileTypeFromExtension(const wxString& ext);