Fix segfault
Fix segfault

pupil-labs/PyAV,xxr3376/PyAV,pupil-labs/PyAV,mikeboers/PyAV,mikeboers/PyAV,pupil-labs/PyAV,markreidvfx/PyAV,markreidvfx/PyAV,xxr3376/PyAV,pupil-labs/PyAV,PyAV-Org/PyAV,mcpv/PyAV,mcpv/PyAV,markreidvfx/PyAV,mcpv/PyAV,PyAV-Org/PyAV,xxr3376/PyAV