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Merge pull request #3372 from xiaotiansf/oss-fuzz-31439

fix oss-fuzz reported issue 31439 (integer range out of scope).

--- a/codec/decoder/core/src/decoder_core.cpp

+++ b/codec/decoder/core/src/decoder_core.cpp

@@ -405,7 +405,7 @@

     //fix Bugzilla 1485229 check if pointers are NULL

     if (pCtx->sRefPic.pRefList[LIST_0][0] && pCtx->sRefPic.pRefList[LIST_1][0]) {

       if (pSliceHeader->uiRefCount[0] == 1 && pSliceHeader->uiRefCount[1] == 1

-          && pCtx->sRefPic.pRefList[LIST_0][0]->iFramePoc + pCtx->sRefPic.pRefList[LIST_1][0]->iFramePoc == 2 * iPoc) {

+          && int64_t(pCtx->sRefPic.pRefList[LIST_0][0]->iFramePoc) + int64_t(pCtx->sRefPic.pRefList[LIST_1][0]->iFramePoc) == 2 * int64_t(iPoc)) {

         pCurDqLayer->bUseWeightedBiPredIdc = false;

         return;

       }