Changed all (?) occurences where validation macros (IS_xxx) had

* include/libxml/parserInternals.h HTMLparser.c HTMLtree.c
  SAX2.c catalog.c debugXML.c entities.c parser.c relaxng.c
  testSAX.c tree.c valid.c xmlschemas.c xmlschemastypes.c
  xpath.c: Changed all (?) occurences where validation macros
  (IS_xxx) had single-byte arguments to use IS_xxx_CH instead
  (e.g. IS_BLANK changed to IS_BLANK_CH).  This gets rid of
  many warning messages on certain platforms, and also high-
  lights places in the library which may need to be enhanced
  for proper UTF8 handling.
diff --git a/HTMLtree.c b/HTMLtree.c
index 11a6125..61287e6 100644
--- a/HTMLtree.c
+++ b/HTMLtree.c
@@ -665,7 +665,7 @@
 		xmlChar *escaped;
 		xmlChar *tmp = value;
 
-		while (IS_BLANK(*tmp)) tmp++;
+		while (IS_BLANK_CH(*tmp)) tmp++;
 
 		escaped = xmlURIEscapeStr(tmp, BAD_CAST"@/:=?;#%&,+");
 		if (escaped != NULL) {