Fixed silly bug introduced by earlier fix for bars (spotted by Jeff)

git-svn-id: https://flot.googlecode.com/svn/trunk@154 1e0a6537-2640-0410-bfb7-f154510ff394

jquery.flot.js

@@ -418,7 +418,7 @@
                         p.push(y);
                         
                         for (m = 2; m < incr; ++m)
-                            p[j + m] = points[j + m];
+                            p.push(points[j + m]);
                     }
 
                     // possibly split lines