fx compilation when configured without the reader should fix #513110

* xmlschemas.c runtest.c testapi.c include/libxml/xmlreader.h
  python/types.c python/libxml_wrap.h python/libxml.c: fx compilation
  when configured without the reader should fix #513110
* doc/*: regenerated
Daniel

svn path=/trunk/; revision=3743
diff --git a/xmlschemas.c b/xmlschemas.c
index a0d0d72..f9ced40 100644
--- a/xmlschemas.c
+++ b/xmlschemas.c
@@ -21731,7 +21731,7 @@
 	    }
 	}
 	return (NULL);
-#ifdef LIBXML_WRITER_ENABLED
+#ifdef LIBXML_READER_ENABLED
     } else if (vctxt->reader != NULL) {
 	xmlChar *nsName;