applied a new patch from Stéphane Bidoul for cleanups rebuilt the API

* xmlreader.c doc/apibuild.py: applied a new patch from
  Stéphane Bidoul for cleanups
* doc/libxml2-api.xml: rebuilt the API description with
  new entry points
Daniel
diff --git a/xmlreader.c b/xmlreader.c
index 3632376..84aba20 100644
--- a/xmlreader.c
+++ b/xmlreader.c
@@ -2282,7 +2282,7 @@
 }
 
 /**
- * xmlTextReaderLocatorLineNumber
+ * xmlTextReaderLocatorLineNumber:
  * @locator: the xmlTextReaderLocatorPtr used
  *
  * Obtain the line number for the given locator.
@@ -2316,7 +2316,7 @@
 }
 
 /**
- * xmlTextReaderLocatorBaseURI
+ * xmlTextReaderLocatorBaseURI:
  * @locator: the xmlTextReaderLocatorPtr used
  *
  * Obtain the base URI for the given locator.