Fix warnings from apibuild.py

include/libxml/tree.h

@@ -180,5 +180,6 @@
     /* XML_DOCB_DOCUMENT_NODE=	21 */ /* removed */
 } xmlElementType;
 
+/** DOC_DISABLE */
 /* For backward compatibility */
 #define XML_DOCB_DOCUMENT_NODE 21
@@ -183,5 +184,6 @@
 /* For backward compatibility */
 #define XML_DOCB_DOCUMENT_NODE 21
+/** DOC_ENABLE */
 
 /**
  * xmlNotation:

include/libxml/xmlexports.h

@@ -67,7 +67,8 @@
  */
 #define XMLPUBVAR XMLPUBLIC extern
 
+/** DOC_DISABLE */
 /* Compatibility */
 #if !defined(LIBXML_DLL_IMPORT)
 #define LIBXML_DLL_IMPORT XMLPUBVAR
 #endif
@@ -70,7 +71,8 @@
 /* Compatibility */
 #if !defined(LIBXML_DLL_IMPORT)
 #define LIBXML_DLL_IMPORT XMLPUBVAR
 #endif
+/** DOC_ENABLE */
 
 #endif /* __XML_EXPORTS_H__ */