msxml3/tests: Fix some stream instance leaks (Valgrind).

dlls/msxml3/tests/saxreader.c

@@ -2443,6 +2443,7 @@ static void test_saxreader(void)
         hr = ISAXXMLReader_parse(reader, var);
         EXPECT_HR(hr, S_OK);
         ok_sequence(sequences, CONTENT_HANDLER_INDEX, test_seq, "attribute value normalization", TRUE);
+        IStream_Release(stream);
 
         resolver = (void*)0xdeadbeef;
         hr = ISAXXMLReader_getEntityResolver(reader, &resolver);
@@ -2476,6 +2477,8 @@ static void test_saxreader(void)
         sprintf(seqname, "%s: cdata test", table->name);
         ok_sequence(sequences, CONTENT_HANDLER_INDEX, test_seq, seqname, TRUE);
 
+        IStream_Release(stream);
+
         /* 2. CDATA sections */
         stream = create_test_stream(test2_cdata_xml, -1);
         V_VT(&var) = VT_UNKNOWN;
@@ -4244,6 +4247,7 @@ static void test_mxwriter_stream(void)
     EXPECT_HR(hr, S_OK);
     ok(pos2.QuadPart == 2, "got wrong position\n");
 
+    IStream_Release(stream);
     ISAXContentHandler_Release(content);
     IMXWriter_Release(writer);
 
@@ -5509,6 +5513,7 @@ static void test_mxattr_localname(void)
 
         ISAXAttributes_Release(saxattr);
         IMXAttributes_Release(mxattr);
+        free_bstrs();
     }
 }