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decode: Fix unchecked dav1d_alloc_aligned in decode_frame

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

--- a/src/decode.c

+++ b/src/decode.c

@@ -2324,6 +2324,12 @@

         uint16_t *lr_ptr = f->lf.lr_lpf_line =

             dav1d_alloc_aligned(f->b4_stride * 4 * 3 * 12 * sizeof(uint16_t), 32);

+        if (!ptr || !lr_ptr) {

+            if (ptr) dav1d_free_aligned(ptr);

+            if (lr_ptr) dav1d_free_aligned(lr_ptr);

+            return -ENOMEM;

+        }

+

         for (int pl = 0; pl <= 2; pl++) {

             f->lf.cdef_line_ptr[0][pl][0] = ptr + f->b4_stride * 4 * 0;

             f->lf.cdef_line_ptr[0][pl][1] = ptr + f->b4_stride * 4 * 1;