Ai! complex_nonzero() has && which should be ||, else decidedly

non-zero things like 5j and complex(1,0) are considered to be
zero/false.  Tim Peters.

Objects/complexobject.c

@@ -514,7 +514,7 @@ static int
 complex_nonzero(v)
 	PyComplexObject *v;
 {
-	return v->cval.real != 0.0 && v->cval.imag != 0.0;
+	return v->cval.real != 0.0 || v->cval.imag != 0.0;
 }
 
 static int