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Merge pull request #687 from JuannyWang/decMbAuxBugFix

[Encoder UT] decMbAux UT bug fix

--- a/test/encoder/EncUT_DecodeMbAux.cpp

+++ b/test/encoder/EncUT_DecodeMbAux.cpp

@@ -368,7 +368,7 @@

         iRefDst[i*FDEC_STRIDE+j] = iPred[i*FDEC_STRIDE+j] = rand() & 255;

     for(int i = 0; i < 4; i++)

       for(int j = 0; j < 4; j++)

-        iRefDct[i][j] = iDct[i*4+j] = (rand() & 65535) - 32768;

+        iRefDct[i][j] = iDct[i*4+j] = (rand() & ((1<<15)-1)) - (1<<14); //2^14 limit, (2^15+32) will cause overflow for SSE2.

     WelsIDctRecI16x16DcAnchor(iRefDst, iRefDct);

     WelsIDctRecI16x16Dc_sse2(iRec, FDEC_STRIDE, iPred, FDEC_STRIDE, iDct);

     int ok = -1;