fix a bug of property

src/public/internal.c

@@ -260,7 +260,7 @@ bool pk_loadmethod(py_StackRef self, py_Name name) {
                 self[0] = *py_getslot(cls_var, 0);
                 self[1] = ti->self;
                 break;
-            default: c11__unreachable();
+            default: return false;
         }
         return true;
     }

tests/95_bugs.py

@@ -169,4 +169,14 @@ for x in xs:
     xs.append(x+1)
 
 assert res == list(range(101))
-assert xs == res
+assert xs == res
+
+# call property
+from vmath import vec2
+
+a = vec2(1, 2)
+try:
+    x = a.x()
+    exit(1)
+except TypeError:
+    pass