Verify value of prec before using

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 ed9331974d68dba971336410310c6ebe71518272..5f81b059731c714008bc61e402c7ead1ca231229 100644
--- a/core/fxcodec/codec/fx_codec_jpx_opj.cpp
+++ b/core/fxcodec/codec/fx_codec_jpx_opj.cpp
@@ -231,6 +231,9 @@ static void sycc422_to_rgb(opj_image_t* img) {
     return;
 
   int prec = img->comps[0].prec;
+  if (prec >= 32)

[Tom Sepez, 2016/09/12 18:37:36]

what if its < 0 ?

[dsinclair, 2016/09/12 19:46:59]

Done. Checked for <= 0 as we do prec - 1 below.

+    return;
+
   int offset = 1 << (prec - 1);
   int upb = (1 << prec) - 1;