Fixes the following Valgrind error: ==21607== Syscall param ioctl(generic) points to uninitialised byte(s) ==21607== at 0x5E8C787: ioctl (in /lib64/libc-2.25.so) ==21607== by 0x8220C17: drmIoctl (in /usr/lib64/libdrm.so.2.4.0) ==21607== by 0x82263CD: drmModeSetCrtc (in /usr/lib64/libdrm.so.2.4.0) ==21607== by 0x7B22095: drm_output_apply_state_legacy (compositor-drm.c:2107) ==21607== by 0x7B2335D: drm_pending_state_apply (compositor-drm.c:2539) ==21607== by 0x7B23AEB: drm_repaint_flush (compositor-drm.c:2773) ==21607== by 0x4E4A3E4: output_repaint_timer_handler (compositor.c:2500) ==21607== by 0x5081496: wl_event_source_timer_dispatch (event-loop.c:235) ==21607== by 0x5081B61: wl_event_loop_dispatch (event-loop.c:633) ==21607== by 0x50803A4: wl_display_run (wayland-server.c:1245) ==21607== by 0x409DD8: main (main.c:2644) ==21607== Address 0xffefff59a is on thread 1's stack ==21607== in frame #2, created by drmModeSetCrtc (???:) ==21607== Uninitialised value was created by a stack allocation ==21607== at 0x7B2782F: drm_output_choose_initial_mode (compositor-drm.c:4842) Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk> Reviewed-by: Ian Ray <ian.ray@ge.com> [Pekka: switch to memset] Reviewed-by: Daniel Stone <daniels@collabora.com>dev
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