File libaom-CVE-2021-30473.patch of Package libaom.29084

--- libaom-1.0.0/aom/src/aom_image.c.orig	2018-06-25 14:54:59.000000000 +0000
+++ libaom-1.0.0/aom/src/aom_image.c	2022-03-30 13:13:25.126133154 +0000
@@ -33,6 +33,8 @@ static aom_image_t *img_alloc_helper(
   unsigned int h, w, s, xcs, ycs, bps;
   unsigned int stride_in_bytes;
 
+  if (img != NULL) memset(img, 0, sizeof(aom_image_t));
+
   /* Treat align==0 like align==1 */
   if (!buf_align) buf_align = 1;
 
@@ -101,8 +103,6 @@ static aom_image_t *img_alloc_helper(
     if (!img) goto fail;
 
     img->self_allocd = 1;
-  } else {
-    memset(img, 0, sizeof(aom_image_t));
   }
 
   img->img_data = img_data;