Avoid creating 3 identical label candidates in offset point mode

...should speed up label position calculation

Author: nyalldawson

src/core/pal/feature.cpp

@@ -279,7 +279,7 @@ namespace pal
   {
     Q_UNUSED( scale );
     Q_UNUSED( delta_width );
-    int nbp = 3;
+    int nbp = 1;
     *lPos = new LabelPosition *[nbp];
 
     // get from feature
@@ -349,15 +349,7 @@ namespace pal
     lx = x + xdiff;
     ly = y + ydiff;
 
-//    double offset = label_x / 4;
-    double offset = 0.0; // don't shift what is supposed to be fixed
-
-    // at the center
     ( *lPos )[0] = new LabelPosition( id, lx, ly, label_x, label_y, angle, cost, this );
-    // shifted to the sides - with higher cost
-    cost = 0.0021;
-    ( *lPos )[1] = new LabelPosition( id, lx + offset, ly, label_x, label_y, angle, cost, this );
-    ( *lPos )[2] = new LabelPosition( id, lx - offset, ly, label_x, label_y, angle, cost, this );
     return nbp;
   }