[1.13] Check canSustainPlant for valid ground in BlockBush (#5362)

patches/minecraft/net/minecraft/block/BlockBush.java.patch

@@ -9,7 +9,16 @@
     protected BlockBush(Block.Builder p_i48437_1_) {
        super(p_i48437_1_);
     }
-@@ -44,4 +44,11 @@
+@@ -26,6 +26,8 @@
+ 
+    public boolean func_196260_a(IBlockState p_196260_1_, IWorldReaderBase p_196260_2_, BlockPos p_196260_3_) {
+       BlockPos blockpos = p_196260_3_.func_177977_b();
++      if (p_196260_1_.func_177230_c() == this) //Forge: This function is called during world gen and placement, before this block is set, so if we are not 'here' then assume it's the pre-check.
++         return p_196260_2_.func_180495_p(blockpos).canSustainPlant(p_196260_2_, blockpos, EnumFacing.UP, this);
+       return this.func_200014_a_(p_196260_2_.func_180495_p(blockpos), p_196260_2_, blockpos);
+    }
+ 
+@@ -44,4 +46,11 @@
     public int func_200011_d(IBlockState p_200011_1_, IBlockReader p_200011_2_, BlockPos p_200011_3_) {
        return 0;
     }