Fix redwood saplings eating the other saplings around it when it does…

…n't grow while using bonemeal. Closes #476

src/main/java/com/progwml6/natura/overworld/block/saplings/BlockRedwoodSapling.java

@@ -1,10 +1,12 @@
 package com.progwml6.natura.overworld.block.saplings;
 
+import java.util.List;
 import java.util.Locale;
 import java.util.Random;
 
 import javax.annotation.Nonnull;
 
+import com.google.common.collect.Lists;
 import com.progwml6.natura.Natura;
 import com.progwml6.natura.library.NaturaRegistry;
 import com.progwml6.natura.overworld.NaturaOverworld;
@@ -35,6 +37,8 @@ public class BlockRedwoodSapling extends BlockSapling
 {
     public static PropertyEnum<SaplingType> FOLIAGE = PropertyEnum.create("foliage", SaplingType.class);
 
+    public List<BlockPos> redwoodSaplingPositions = Lists.newArrayList();
+
     public BlockRedwoodSapling()
     {
         this.setCreativeTab(NaturaRegistry.tabWorld);
@@ -151,18 +155,31 @@ public void generateTree(@Nonnull World worldIn, @Nonnull BlockPos pos, @Nonnull
         }
 
         // replace saplings with air
-
         this.replaceBlocksWithAir(worldIn, pos);
 
         // try generating
         gen.generateTree(rand, worldIn, pos);
 
         if (worldIn.isAirBlock(pos))
         {
+            this.replaceAirWithBlocks(worldIn, state);
             worldIn.setBlockState(pos, state, 4);
         }
     }
 
+    private void replaceAirWithBlocks(World worldIn, IBlockState state)
+    {
+        for (BlockPos pos : redwoodSaplingPositions)
+        {
+            if (worldIn.isAirBlock(pos))
+            {
+                worldIn.setBlockState(pos, state, 4);
+            }
+        }
+
+        redwoodSaplingPositions.clear();
+    }
+
     /**
      * Check whether the given BlockPos has a Sapling of the given type
      */
@@ -204,6 +221,7 @@ public void replaceBlocksWithAir(World worldIn, BlockPos pos)
             {
                 if (this.isRedwoodComplete(worldIn, pos.add(x, 0, z), SaplingType.REDWOOD))
                 {
+                    redwoodSaplingPositions.add(pos.add(x, 0, z));
                     worldIn.setBlockToAir(pos.add(x, 0, z));
                 }
             }