Avoid nullptr access in sycc422_to_rgb and sycc420_to_rgb

core/fxcodec/codec/fx_codec_jpx_opj.cpp

Index: core/fxcodec/codec/fx_codec_jpx_opj.cpp
diff --git a/core/fxcodec/codec/fx_codec_jpx_opj.cpp b/core/fxcodec/codec/fx_codec_jpx_opj.cpp
index a1c38d06e93629b1ce277e966a2bc0329987e71e..e64fa471cd20df7361c3c8252dde1d23b6cb3b64 100644
--- a/core/fxcodec/codec/fx_codec_jpx_opj.cpp
+++ b/core/fxcodec/codec/fx_codec_jpx_opj.cpp
@@ -247,6 +247,9 @@ static void sycc422_to_rgb(opj_image_t* img) {
   const int* y = img->comps[0].data;
   const int* cb = img->comps[1].data;
   const int* cr = img->comps[2].data;
+  if (!y || !cb || !cr)
+    return;
+
   int *d0, *d1, *d2, *r, *g, *b;
   d0 = r = FX_Alloc(int, max_size.ValueOrDie());
   d1 = g = FX_Alloc(int, max_size.ValueOrDie());
@@ -324,6 +327,9 @@ void sycc420_to_rgb(opj_image_t* img) {
   const int* y = img->comps[0].data;
   const int* cb = img->comps[1].data;
   const int* cr = img->comps[2].data;
+  if (!y || !cb || !cr)
+    return;
+
   const int* ny = nullptr;
   int* nr = nullptr;
   int* ng = nullptr;