integrated a cleaned up version of Marc Liyanage' patch for boolean

* HTMLtree.c include/libxml/HTMLtree.h: integrated a cleaned up
  version of Marc Liyanage' patch for boolean attributes in HTML
  output
Daniel
diff --git a/include/libxml/HTMLtree.h b/include/libxml/HTMLtree.h
index ada80fb..600b0ef 100644
--- a/include/libxml/HTMLtree.h
+++ b/include/libxml/HTMLtree.h
@@ -19,6 +19,7 @@
 extern "C" {
 #endif
 
+
 /**
  * HTML_TEXT_NODE:
  *
@@ -100,6 +101,11 @@
 					 xmlDocPtr cur,
 					 const char *encoding,
 					 int format);
+
+int		htmlIsBooleanAttr	(const xmlChar *name);
+
+
+
 #ifdef __cplusplus
 }
 #endif