more bug fixes

Author: BobDotCom

discord/commands/commands.py

@@ -586,9 +586,9 @@ def __init__(
         self.min_value: minmax_typehint = kwargs.pop("min_value", None)
         self.max_value: minmax_typehint = kwargs.pop("max_value", None)
 
-        if not isinstance(self.min_value, minmax_types):
+        if not (isinstance(self.min_value, minmax_types) or self.min_value is None):
             raise TypeError(f"Expected {minmax_typehint} for min_value, got \"{type(self.min_value).__name__}\"")
-        if not isinstance(self.max_value, minmax_types):
+        if not (isinstance(self.max_value, minmax_types) or self.min_value is None):
             raise TypeError(f"Expected {minmax_typehint} for max_value, got \"{type(self.max_value).__name__}\"")
 
     def to_dict(self) -> Dict: