Bugfix:Solved the problem of expression conversion of list into tuples.

bzr revid: jvo@tinyerp.com-20080807130807-jfzlq06ldouddkzx

bin/osv/expression.py

@@ -81,6 +81,9 @@ class expression(object):
                 exp = exp[0]
             else:
                 if not self._is_operator(exp[0][0]):
+                    if isinstance(exp[0],list):
+                        exp=tuple(exp[0])
+                    else:
                         exp.insert(0, '&')
                         exp = tuple(exp)
                 else: