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Merge "vp8_yv12_realloc_frame_buffer: move allocation check" into main

--- a/vpx_scale/generic/yv12config.c

+++ b/vpx_scale/generic/yv12config.c

@@ -64,6 +64,10 @@

     if (!ybf->buffer_alloc) {

       ybf->buffer_alloc = (uint8_t *)vpx_memalign(32, frame_size);

+      if (!ybf->buffer_alloc) {

+        ybf->buffer_alloc_sz = 0;

+        return -1;

+      }

 #if defined(__has_feature)

 #if __has_feature(memory_sanitizer)

       // This memset is needed for fixing the issue of using uninitialized

@@ -75,7 +79,7 @@

       ybf->buffer_alloc_sz = frame_size;

     }

-    if (!ybf->buffer_alloc || ybf->buffer_alloc_sz < frame_size) return -1;

+    if (ybf->buffer_alloc_sz < frame_size) return -1;

     /* Only support allocating buffers that have a border that's a multiple

      * of 32. The border restriction is required to get 16-byte alignment of