little typing hint fix

Author: USLTD

src/pointers/base_pointers.py

@@ -311,7 +311,7 @@ def _get_ptr(cls, obj: Union[T, "BasePointer[T]"]) -> "BasePointer[T]":
             else cls.make_from(obj)
         )
 
-    def _cleanup(self):
+    def _cleanup(self) -> None:
         if self.address:
             remove_ref(~self)
 

src/pointers/c_pointer.py

@@ -61,7 +61,7 @@ def decref(self) -> bool:
         ...
 
     @handle
-    def _cleanup(self):
+    def _cleanup(self) -> None:
         if self.address:
             if (type(~self) is not str) and (self.decref):
                 remove_ref(~self)
@@ -78,7 +78,7 @@ def __init__(
         void_p: bool = True,
         decref: bool = True,
         alt: bool = False,
-    ):
+    ) -> None:
         self._void_p = void_p
         super().__init__(address, size)
         self._type = data_type

src/pointers/structure.py

@@ -147,7 +147,7 @@ def __setattr__(self, name: str, value: Any):
             self._struct.__setattr__(name, value)
         super().__setattr__(name, value)
 
-    def _sync(self):
+    def _sync(self) -> None:
         for name in self._hints:
             setattr(self, name, getattr(self._struct, name))