fix: Specify required argument types for variadic functions (#1850)

Author: mattabullock

discord/opus.py

@@ -147,7 +147,7 @@ def _err_ne(result: T, func: Callable, args: list) -> T:
 # The fourth is the error handler.
 exported_functions: list[tuple[Any, ...]] = [
     # Generic
-    ("opus_get_version_string", None, ctypes.c_char_p, None),
+    ("opus_get_version_string", [], ctypes.c_char_p, None),
     ("opus_strerror", [ctypes.c_int], ctypes.c_char_p, None),
     # Encoder functions
     ("opus_encoder_get_size", [ctypes.c_int], ctypes.c_int, None),
@@ -169,7 +169,7 @@ def _err_ne(result: T, func: Callable, args: list) -> T:
         ctypes.c_int32,
         _err_lt,
     ),
-    ("opus_encoder_ctl", None, ctypes.c_int32, _err_lt),
+    ("opus_encoder_ctl", [EncoderStructPtr, ctypes.c_int], ctypes.c_int32, _err_lt),
     ("opus_encoder_destroy", [EncoderStructPtr], None, None),
     # Decoder functions
     ("opus_decoder_get_size", [ctypes.c_int], ctypes.c_int, None),
@@ -205,7 +205,7 @@ def _err_ne(result: T, func: Callable, args: list) -> T:
         ctypes.c_int,
         _err_lt,
     ),
-    ("opus_decoder_ctl", None, ctypes.c_int32, _err_lt),
+    ("opus_decoder_ctl", [DecoderStructPtr, ctypes.c_int], ctypes.c_int32, _err_lt),
     ("opus_decoder_destroy", [DecoderStructPtr], None, None),
     (
         "opus_decoder_get_nb_samples",