Fix test

Author: ddelange

magic/__init__.py

@@ -420,7 +420,8 @@ def magic_getparam(cookie, param):
         raise NotImplementedError("magic_getparam not implemented")
     val = c_size_t()
     with LOCK:
-        return _magic_getparam(cookie, param, byref(val)).value
+        _magic_getparam(cookie, param, byref(val))
+    return val.value
 
 
 _has_version = False