CatServer/patches/net/minecraft/entity/EntityFlying.java.patch

--- ../src-base/minecraft/net/minecraft/entity/EntityFlying.java
+++ ../src-work/minecraft/net/minecraft/entity/EntityFlying.java
@@ -44,7 +44,9 @@
 
             if (this.onGround)
             {
-                f = this.world.getBlockState(new BlockPos(MathHelper.floor(this.posX), MathHelper.floor(this.getEntityBoundingBox().minY) - 1, MathHelper.floor(this.posZ))).getBlock().slipperiness * 0.91F;
+                BlockPos underPos = new BlockPos(MathHelper.floor(this.posX), MathHelper.floor(this.getEntityBoundingBox().minY) - 1, MathHelper.floor(this.posZ));
+                IBlockState underState = this.world.getBlockState(underPos);
+                f = underState.getBlock().getSlipperiness(underState, this.world, underPos, this) * 0.91F;
             }
 
             float f1 = 0.16277136F / (f * f * f);
@@ -53,7 +55,9 @@
 
             if (this.onGround)
             {
-                f = this.world.getBlockState(new BlockPos(MathHelper.floor(this.posX), MathHelper.floor(this.getEntityBoundingBox().minY) - 1, MathHelper.floor(this.posZ))).getBlock().slipperiness * 0.91F;
+                BlockPos underPos = new BlockPos(MathHelper.floor(this.posX), MathHelper.floor(this.getEntityBoundingBox().minY) - 1, MathHelper.floor(this.posZ));
+                IBlockState underState = this.world.getBlockState(underPos);
+                f = underState.getBlock().getSlipperiness(underState, this.world, underPos, this) * 0.91F;
             }
 
             this.move(MoverType.SELF, this.motionX, this.motionY, this.motionZ);