ass="w"> </span><span class="n">x2</span>
<span class="c">!</span>
<span class="c">!     CHECK AND MODIFY (IF NECESSARY) THIS INITIAL</span>
<span class="c">!     ESTIMATE OF THE PERCENT POINT</span>
<span class="c">!     TO ASSURE THAT IT BE NON-NEGATIVE.</span>
<span class="c">!</span>
<span class="w">                  </span><span class="k">IF</span><span class="w"> </span><span class="p">(</span><span class="w"> </span><span class="n">ix2</span><span class="o">&lt;</span><span class="mi">0</span><span c