libva-v4l2-request-fourier: bump pin to c454618 (#15 transparent resize)

Bumps both Arch PKGBUILD and Debian build-deb.sh pins to PR #16 —
codec_store_buffer + request_pool_resize transparent OUTPUT-pool grow
on a mid-session resolution upshift overrun.  Picks up the frame-
survival path that supersedes #13's drop-and-recreate fallback.

Dual-pin per feedback_marfrit_packages_dual_pin so both Arch and
Debian repos see check-already-published.sh report a new version.

debian/libva-v4l2-request-fourier/build-deb.sh

@@ -10,23 +10,25 @@
 # Upstream fork: https://git.reauktion.de/marfrit/libva-v4l2-request-fourier
 set -euo pipefail
 
-# Same pin as the Arch PKGBUILD.  2860d75 = PR #14 merge "picture:
-# bounds-check codec_store_buffer slice writes against source_size
-# (#13)" — guards the three append sites in codec_store_buffer's
-# VASliceDataBufferType branch (H.264 Annex-B start code, VP8
-# uncompressed-header pad, slice payload) against the OUTPUT pool
-# slot's fixed sizeimage; returns VA_STATUS_ERROR_ALLOCATION_FAILED
-# with a request_log line instead of memcpy'ing past the mmap on a
-# resolution upshift mid-stream.  Fixes a SIGSEGV in mpv
-# --hwdec=vaapi-copy and a heap-corruption hazard in Firefox RDD.
-# The root-cause refactor (re-init OUTPUT pool / re-create surfaces
-# on resolution change, or grow source_data on demand) is tracked
-# as the follow-up backlog item; this is the memory-safety floor.
+# Same pin as the Arch PKGBUILD.  c454618 = PR #16 merge "picture,
+# request_pool: transparent OUTPUT-pool resize on bitstream overrun
+# (#15)" — follow-up root-cause fix to #13/#14.  On a mid-stream
+# bitstream-budget overrun (typical cause: SPS-driven resolution
+# upshift in an adaptive-bitrate stream), codec_store_buffer now
+# snapshots the in-flight surface's accumulated bytes, releases its
+# OUTPUT pool slot, calls request_pool_resize (STREAMOFF →
+# REQBUFS(0) → S_FMT with 2×sizeimage hint, capped at 1 GiB, page-
+# aligned → CREATE_BUFS → mmap → media_request_alloc → STREAMON),
+# re-acquires a slot, re-mirrors the surface's source_{data,size,
+# request_fd}, restores the bytes, and continues.  The frame
+# survives instead of being dropped back to libavcodec for surface
+# recreation.  CAPTURE side untouched (per-queue V4L2 streaming
+# independence).
 #
-# Prior pin (77f9236) = PR #12 merge — av1_set_controls
-# (V4L2_CID_STATELESS_AV1_SEQUENCE for the daedalus daemon track).
-UPSTREAM_COMMIT=2860d75afe6a8e34df6afb508ff85c822bf9e908
-PKGVER=1.0.0+r388+g2860d75
+# Prior pin (2860d75) = PR #14 merge — codec_store_buffer bounds-
+# check floor (#13).
+UPSTREAM_COMMIT=c454618ae11addce2e17b560f4deeacbed067d98
+PKGVER=1.0.0+r390+gc454618
 PKGREL=1
 
 HERE=$(dirname "$(readlink -f "$0")")