removed some error in block calc

src/bk/BlockCalc.java

@@ -143,7 +143,7 @@ public class BlockCalc implements AlgorithmStage {
         PseudoCodeNode midLoop = new PseudoCodeNode( TextLayoutHelper.setupPseudoCode( "foreach m in mids do", vars ), tree, new ForEachLoop<Integer>( "m" ) {
             @Override
             protected List<Integer> list(ReadOnlyMemory m) {
-                return m.read( "neighbors", MemoryType.LOCAL );
+                return m.read( "mids", MemoryType.LOCAL );
             }
         } );
         ifNeighbors.add( midLoop );