patch from Richard Jinks to fix a problem introduced in the previous patch

* xpath.c: patch from Richard Jinks to fix a problem introduced
  in the previous patch and pointed by Norm
Daniel
diff --git a/xpath.c b/xpath.c
index 1c476b2..adc3310 100644
--- a/xpath.c
+++ b/xpath.c
@@ -8100,7 +8100,7 @@
 	    if (CUR != ')') {
 		name = xmlXPathParseLiteral(ctxt);
 		CHECK_ERROR 0;
-		*type = NODE_TEST_PI;
+		*test = NODE_TEST_PI;
 		SKIP_BLANKS;
 	    }
 	}