Frédéric Crozat gave a patch related to the change of Include paths

* libxml.m4: Frédéric Crozat gave a patch related to the change
  of Include paths breaking the libxml.m4
Daniel
diff --git a/libxml.m4 b/libxml.m4
index caa4d49..ed13cff 100644
--- a/libxml.m4
+++ b/libxml.m4
@@ -253,7 +253,7 @@
       AC_TRY_RUN([
 #include <stdlib.h>
 #include <stdio.h>
-#include <xmlversion.h>
+#include <libxml/xmlversion.h>
 
 int 
 main()
@@ -348,7 +348,7 @@
           CFLAGS="$CFLAGS $XML_CFLAGS"
           LIBS="$LIBS $XML_LIBS"
           AC_TRY_LINK([
-#include <xmlversion.h>
+#include <libxml/xmlversion.h>
 #include <stdio.h>
 ],      [ LIBXML_TEST_VERSION; return 0;],
         [ echo "*** The test program compiled, but did not run. This usually means"