try to avoid problems when compiling on Windows Daniel

* libxml.h: try to avoid problems when compiling on Windows
Daniel
diff --git a/libxml.h b/libxml.h
index eaec654..d229ba3 100644
--- a/libxml.h
+++ b/libxml.h
@@ -9,6 +9,9 @@
 #ifndef __XML_LIBXML_H__
 #define __XML_LIBXML_H__
 
+#ifndef IN_LIBXML
+#define IN_LIBXML
+#endif
 #if defined(WIN32) && !defined(__CYGWIN__)
 #include "win32config.h"
 #elif defined(macintosh)
@@ -30,6 +33,5 @@
 #define TRIO_REPLACE_STDIO
 #include "trio.h"
 #endif
-#define IN_LIBXML
 
 #endif /* ! __XML_LIBXML_H__ */