 52</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Pixel&gt;</div><div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;<span class="keyword">struct </span>row_buffer_helper</div><div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;&lt;</div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;    Pixel,</div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;    