[libxml2] Fix regression introduced with 477c7f6a

[Nick Wellnhofer <nwellnhof src gnome org>]

commit 741b0d0a8b9bbee67d68af022cb3137c74e9cd0f
Author: Nick Wellnhofer <wellnhofer aevum de>
Date:   Tue Jul 7 12:54:34 2020 +0200

    Fix regression introduced with 477c7f6a
    
    The 'inSubset' member is actually used by the SAX2 handlers. Store
    extra parser state in 'hasPErefs'.

 HTMLparser.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)
---
diff --git a/HTMLparser.c b/HTMLparser.c
index 468db107..366c19b3 100644
--- a/HTMLparser.c
+++ b/HTMLparser.c
@@ -5160,9 +5160,9 @@ htmlParseLookupSequence(htmlParserCtxtPtr ctxt, xmlChar first,
 
     if (ctxt->checkIndex > base) {
         base = ctxt->checkIndex;
-        /* Abuse inSubset member to restore current state. */
-        incomment = ctxt->inSubset & 1 ? 1 : 0;
-        invalue = ctxt->inSubset & 2 ? 1 : 0;
+        /* Abuse hasPErefs member to restore current state. */
+        incomment = ctxt->hasPErefs & 1 ? 1 : 0;
+        invalue = ctxt->hasPErefs & 2 ? 1 : 0;
     }
 
     if (in->buf == NULL) {
@@ -5240,12 +5240,12 @@ htmlParseLookupSequence(htmlParserCtxtPtr ctxt, xmlChar first,
         }
     }
     ctxt->checkIndex = base;
-    /* Abuse inSubset member to track current state. */
-    ctxt->inSubset = 0;
+    /* Abuse hasPErefs member to track current state. */
+    ctxt->hasPErefs = 0;
     if (incomment)
-        ctxt->inSubset |= 1;
+        ctxt->hasPErefs |= 1;
     if (invalue)
-        ctxt->inSubset |= 2;
+        ctxt->hasPErefs |= 2;
 #ifdef DEBUG_PUSH
     if (next == 0)
         xmlGenericError(xmlGenericErrorContext,