reset redraw variable

git-svn-id: svn+ssh://svn.internal.sanger.ac.uk/repos/svn/pathsoft/artemis/trunk@15662 ee4ac58c-ac51-4696-9907-e4b3aa274f04

uk/ac/sanger/artemis/components/alignment/CoveragePanel.java

@@ -315,6 +315,11 @@ import net.sf.samtools.SAMRecord;
      */
     protected boolean isRedraw()
     {
+      if(redraw)
+      {
+        redraw = false;
+        return true;
+      }
       return redraw;
     }