Avoid extra processing of MarkupDecl when EOF

For https://bugzilla.gnome.org/show_bug.cgi?id=756263

One place where ctxt->instate == XML_PARSER_EOF whic was set up
by entity detection issues doesn't get noticed, and even overrided

1 files changed, 8 insertions, 0 deletions

diff --git a/parser.c b/parser.c
index d67b3003..134afe70 100644
--- a/parser.c
+++ b/parser.c
@@ -6972,6 +6972,14 @@ xmlParseMarkupDecl(xmlParserCtxtPtr ctxt) {
 	    xmlParsePI(ctxt);
 	}
     }
+
+    /*
+     * detect requirement to exit there and act accordingly
+     * and avoid having instate overriden later on
+     */
+    if (ctxt->instate == XML_PARSER_EOF)
+        return;
+
     /*
      * This is only for internal subset. On external entities,
      * the replacement is done before parsing stage