don't give error on startup of any application using wxHTML just because /usr/local/share/mime/globs doesn't exist

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@54734 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/unix/mimetype.cpp

@@ -249,6 +249,9 @@ void wxMimeTypesManagerImpl::LoadXDGAppsFilesFromDir(const wxString& dirname)
 
 void wxMimeTypesManagerImpl::LoadXDGGlobs(const wxString& filename)
 {
+    if ( !wxFileName::FileExists(filename) )
+        return;
+
     wxLogTrace(TRACE_MIME, wxT("loading XDG globs file from %s"), filename.c_str());
 
     wxMimeTextFile file(filename);