[x265] [PATCH] TComPicYuv: initialize picBuf to avoid valgrind's uninitialized pixel access report

[kavitha at multicorewareinc.com]

# HG changeset patch
# User Kavitha Sampath <kavitha at multicorewareinc.com>
# Date 1403614220 -19800
#      Tue Jun 24 18:20:20 2014 +0530
# Node ID 65f3b95b70ced156433882d3d5fbc39160dfccaa
# Parent  18f936182df50cc5126d1707cd7c2b5fef289ccb
TComPicYuv: initialize picBuf to avoid valgrind's uninitialized pixel access report

diff -r 18f936182df5 -r 65f3b95b70ce source/Lib/TLibCommon/TComPicYuv.cpp
--- a/source/Lib/TLibCommon/TComPicYuv.cpp	Mon Jun 23 17:03:49 2014 -0700
+++ b/source/Lib/TLibCommon/TComPicYuv.cpp	Tue Jun 24 18:20:20 2014 +0530
@@ -92,6 +92,10 @@
     CHECKED_MALLOC(m_picBuf[1], pixel, m_strideC * ((maxHeight >> m_vChromaShift) + (m_chromaMarginY * 2)));
     CHECKED_MALLOC(m_picBuf[2], pixel, m_strideC * ((maxHeight >> m_vChromaShift) + (m_chromaMarginY * 2)));
 
+    memset(m_picBuf[0], 0, m_stride * (maxHeight + (m_lumaMarginY * 2)));
+    memset(m_picBuf[1], 0, m_strideC * ((maxHeight >> m_vChromaShift) + (m_chromaMarginY * 2)));
+    memset(m_picBuf[2], 0, m_strideC * ((maxHeight >> m_vChromaShift) + (m_chromaMarginY * 2)));
+
     m_picOrg[0] = m_picBuf[0] + m_lumaMarginY   * getStride()  + m_lumaMarginX;
     m_picOrg[1] = m_picBuf[1] + m_chromaMarginY * getCStride() + m_chromaMarginX;
     m_picOrg[2] = m_picBuf[2] + m_chromaMarginY * getCStride() + m_chromaMarginX;