Snippets for python:av 19.0.1 from Nix aarch64-darwin

Sourced from https://hydra.nixos.org/log/292sc0qg5lrd37h3mnqxdx0fk9bmyvli-python3.13-av-19.0.1.drv.

src/av/stream.c:12766:15: warning: unused variable 'is_unsigned' [-Wunused-variable]

src/av/packet.c:14612:15: warning: unused variable 'is_unsigned' [-Wunused-variable]

src/av/video/codeccontext.c:13913:15: warning: unused variable 'is_unsigned' [-Wunused-variable]

src/av/video/codeccontext.c:14227:15: warning: unused variable 'is_unsigned' [-Wunused-variable]

src/av/video/codeccontext.c:14541:15: warning: unused variable 'is_unsigned' [-Wunused-variable]

src/av/video/codeccontext.c:14855:15: warning: unused variable 'is_unsigned' [-Wunused-variable]

src/av/video/frame.c:41838:15: warning: unused variable 'is_unsigned' [-Wunused-variable]

src/av/video/frame.c:42152:15: warning: unused variable 'is_unsigned' [-Wunused-variable]

src/av/video/frame.c:42466:15: warning: unused variable 'is_unsigned' [-Wunused-variable]

src/av/video/frame.c:42780:15: warning: unused variable 'is_unsigned' [-Wunused-variable]

src/av/video/frame.c:43094:15: warning: unused variable 'is_unsigned' [-Wunused-variable]

src/av/video/frame.c:43408:15: warning: unused variable 'is_unsigned' [-Wunused-variable]

src/av/video/frame.c:44023:15: warning: unused variable 'is_unsigned' [-Wunused-variable]

src/av/codec/hwaccel.c:13129:15: warning: unused variable 'is_unsigned' [-Wunused-variable]

src/av/container/core.c:15818:15: warning: unused variable 'is_unsigned' [-Wunused-variable]

src/av/container/input.c:5995:72: warning: comparison of integers of different signs: 'int' and 'unsigned int' [-Wsign-compare]
 5995 |       __pyx_t_18 = (__pyx_cur_scope->__pyx_v_read_packet->stream_index < __pyx_cur_scope->__pyx_v_nb_streams);
      |                     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

src/av/container/output.c:5031:13: warning: unused function '__pyx_pw_2av_9container_6output_15OutputContainer_3__del__' [-Wunused-function]
 5031 | static void __pyx_pw_2av_9container_6output_15OutputContainer_3__del__(PyObject *__pyx_v_self) {
      |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

src/av/filter/link.c:4421:14: warning: unused variable '__pyx_doc_2av_6filter_4link_9FilterPad_4__eq__' [-Wunused-const-variable]
 4421 | PyDoc_STRVAR(__pyx_doc_2av_6filter_4link_9FilterPad_4__eq__, "FilterPad.__eq__(other)\n\nTwo pads are equal when they denote the same pad.\n\nPads are built on access rather than cached, so ``is`` compares the\nwrappers while this compares what they point at.");
      |              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

src/av/filter/graph.c:6196:62: warning: comparison of integers of different signs: 'int' and 'unsigned int' [-Wsign-compare]
 6196 |   for (__pyx_t_3 = __pyx_v_self->_nb_filters_seen; __pyx_t_3 < __pyx_t_2; __pyx_t_3+=1) {
      |                                                    ~~~~~~~~~ ^ ~~~~~~~~~

src/av/sidedata/motionvectors.c:4342:14: warning: unused variable '__pyx_doc_2av_8sidedata_13motionvectors_13MotionVectors_8__iter__' [-Wunused-const-variable]
 4342 | PyDoc_STRVAR(__pyx_doc_2av_8sidedata_13motionvectors_13MotionVectors_8__iter__, "MotionVectors.__iter__()\n\nIterate over all motion vectors.");
      |              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

src/av/sidedata/sidedata.c:5383:14: warning: unused variable '__pyx_doc_2av_8sidedata_8sidedata_18_SideDataContainer_4__iter__' [-Wunused-const-variable]
 5383 | PyDoc_STRVAR(__pyx_doc_2av_8sidedata_8sidedata_18_SideDataContainer_4__iter__, "_SideDataContainer.__iter__()\n\nIterate the :class:`Type` keys, as a mapping must.\n\nThe values are reachable positionally too, via an integer or a slice.");
      |              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~