fixed bug #310264, basically it's about reentrancy of count based

* xmlregexp.c: fixed bug #310264, basically it's about reentrancy
  of count based transition, when going though the counter must
  be reset to 0
* test/schemas/bug310264* result/schemas/bug310264*: added the
  regression test.
Daniel
diff --git a/test/schemas/bug310264_0.xsd b/test/schemas/bug310264_0.xsd
new file mode 100644
index 0000000..6f2b333
--- /dev/null
+++ b/test/schemas/bug310264_0.xsd
@@ -0,0 +1,18 @@
+<xs:schema xmlns:tns="http://myns"
+        targetNamespace="http://myns"
+        xmlns:xs="http://www.w3.org/2001/XMLSchema"
+>
+
+  <xs:element name="a" />
+
+  <xs:complexType name="c" >
+        <xs:sequence minOccurs="2" maxOccurs="4">
+             <xs:sequence minOccurs="19" maxOccurs="20">
+                  <xs:element ref="tns:a" />
+             </xs:sequence>
+        </xs:sequence>
+  </xs:complexType>
+
+  <xs:element name="c" type="tns:c" />
+
+</xs:schema>