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decode: Fix unchecked malloc in decode_frame

Signed-off-by: Derek Buitenhuis <[email protected]>

--- a/src/decode.c

+++ b/src/decode.c

@@ -2285,6 +2285,7 @@

             f->frame_thread.tile_start_off =

                 malloc(sizeof(*f->frame_thread.tile_start_off) *

                        f->frame_hdr.tiling.cols * f->frame_hdr.tiling.rows);

+            if (!f->frame_thread.tile_start_off) return -ENOMEM;

         }

         f->n_ts = f->frame_hdr.tiling.cols * f->frame_hdr.tiling.rows;

     }