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Initialize a local variable

This fixes warnings with GCC about a variable that may be used
uninitialized (if iResProperty was an incorrect value).

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

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

@@ -825,7 +825,7 @@

   uint32_t uiCbpBit;

   int32_t pSignificantMap[16] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};

-  int32_t iMbResProperty;

+  int32_t iMbResProperty = 0;

   GetMbResProperty (&iMbResProperty, &iResProperty, false);

   const uint16_t* pDeQuantMul = (pCtx->bUseScalingList) ? pCtx->pDequant_coeff4x4[iMbResProperty][uiQp] :

                                 g_kuiDequantCoeff[uiQp];