removed a potentially uninitialized variable error fixed a deprecation

* xpath.c: removed a potentially uninitialized variable error
* python/generator.py: fixed a deprecation warning
* python/tests/tstLastError.py: silent the damn test when Okay !
Daniel
diff --git a/xpath.c b/xpath.c
index f0cb291..162f6e3 100644
--- a/xpath.c
+++ b/xpath.c
@@ -8931,6 +8931,8 @@
 
 	CHECK_ERROR;
 
+	type = (xmlXPathTypeVal) 0;
+	test = (xmlXPathTestVal) 0;
 	name = xmlXPathCompNodeTest(ctxt, &test, &type, &prefix, name);
 	if (test == 0)
 	    return;