1. many, many, many warnings fixed (from HP-UX build log; 50% are still left)

2. attempt (failed) at compiling wxGTK with GTK+ 1.3.0


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5152 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/datetime.inl

@@ -287,7 +287,8 @@ wxDateTime& wxDateTime::operator+=(const wxDateSpan& diff)
 wxDateTime wxDateTime::ToTimezone(const wxDateTime::TimeZone& tz,
                                   bool noDST) const
 {
-    return wxDateTime(*this).MakeTimezone(tz, noDST);
+    wxDateTime dt(*this);
+    return dt.MakeTimezone(tz, noDST);
 }
 
 // ----------------------------------------------------------------------------