fix a memeory leak in internal subset parsing with a fix from Ashwin add

* parser.c: fix a memeory leak in internal subset parsing with
  a fix from Ashwin
* test/errors/content1.xml result/errors/content1.xml*:
  add test to regressions
Daniel

svn path=/trunk/; revision=3680
diff --git a/configure.in b/configure.in
index dbc3932..699232f 100644
--- a/configure.in
+++ b/configure.in
@@ -5,7 +5,7 @@
 
 LIBXML_MAJOR_VERSION=2
 LIBXML_MINOR_VERSION=6
-LIBXML_MICRO_VERSION=30
+LIBXML_MICRO_VERSION=31
 LIBXML_MICRO_VERSION_SUFFIX=
 LIBXML_VERSION=$LIBXML_MAJOR_VERSION.$LIBXML_MINOR_VERSION.$LIBXML_MICRO_VERSION$LIBXML_MICRO_VERSION_SUFFIX
 LIBXML_VERSION_INFO=`expr $LIBXML_MAJOR_VERSION + $LIBXML_MINOR_VERSION`:$LIBXML_MICRO_VERSION:$LIBXML_MINOR_VERSION