ForgePatch/patches/minecraft/net/minecraft/block/BlockPistonBase.java.patch

--- ../src-base/minecraft/net/minecraft/block/BlockPistonBase.java
+++ ../src-work/minecraft/net/minecraft/block/BlockPistonBase.java
@@ -11,6 +11,7 @@
 import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.init.Blocks;
 import net.minecraft.item.ItemStack;
+import net.minecraft.server.management.PlayerManager;
 import net.minecraft.tileentity.TileEntity;
 import net.minecraft.tileentity.TileEntityPiston;
 import net.minecraft.util.AxisAlignedBB;
@@ -360,7 +361,8 @@
                 return false;
             }
 
-            return !(p_150080_0_ instanceof ITileEntityProvider);
+            return !(p_150080_1_.func_147439_a(p_150080_2_, p_150080_3_, p_150080_4_).hasTileEntity(p_150080_1_.getBlockMetadata(p_150080_2_, p_150080_3_, p_150080_4_)));
+            
         }
     }
 
@@ -375,14 +377,14 @@
         {
             if (l1 < 13)
             {
-                if (j1 <= 0 || j1 >= 255)
+                if (j1 <= 0 || j1 >= p_150077_0_.getHeight())
                 {
                     return false;
                 }
 
                 Block block = p_150077_0_.func_147439_a(i1, j1, k1);
 
-                if (block.func_149688_o() != Material.field_151579_a)
+                if (!block.isAir(p_150077_0_, i1, j1, k1))
                 {
                     if (!func_150080_a(block, p_150077_0_, i1, j1, k1, true))
                     {
@@ -420,14 +422,14 @@
         {
             if (l1 < 13)
             {
-                if (j1 <= 0 || j1 >= 255)
+                if (j1 <= 0 || j1 >= p_150079_1_.getHeight())
                 {
                     return false;
                 }
 
                 Block block = p_150079_1_.func_147439_a(i1, j1, k1);
 
-                if (block.func_149688_o() != Material.field_151579_a)
+                if (!block.isAir(p_150079_1_, i1, j1, k1))
                 {
                     if (!func_150080_a(block, p_150079_1_, i1, j1, k1, true))
                     {
@@ -448,7 +450,9 @@
                         continue;
                     }
 
-                    block.func_149697_b(p_150079_1_, i1, j1, k1, p_150079_1_.getBlockMetadata(i1, j1, k1), 0);
+                    //With our change to how snowballs are dropped this needs to disallow to mimic vanilla behavior.
+                    float chance = block instanceof BlockSnow ? -1.0f : 1.0f;
+                    block.func_149690_a(p_150079_1_, i1, j1, k1, p_150079_1_.getBlockMetadata(i1, j1, k1), chance, 0);
                     p_150079_1_.func_147468_f(i1, j1, k1);
                 }
             }