ass="lineno">  123</span>&#160;    row_buffer_helper( std::size_t width</div><div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;                     , <span class="keywordtype">bool</span>        in_bytes</div><div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;                     )</div><div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;    : _c( ( width</div><div class="line"><a name="l00127"></a><span class="lineno">  127</s