Check for wxFS_READ in OpenFile.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@43780 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/filesys.cpp

@@ -385,6 +385,9 @@ wxFileSystemHandler *wxFileSystem::MakeLocal(wxFileSystemHandler *h)
 
 wxFSFile* wxFileSystem::OpenFile(const wxString& location, int flags)
 {
+    if ((flags & wxFS_READ) == 0)
+        return NULL;
+
     wxString loc = MakeCorrectPath(location);
     unsigned i, ln;
     wxChar meta;