Fix crash when placing a channel by clicking the bottom of another ch…

…annel (#73)

src/main/java/knightminer/ceramics/blocks/ChannelBlock.java

@@ -192,22 +192,24 @@ public BlockState getStateForPlacement(BlockItemUseContext context) {
 		BlockState state = this.getDefaultState().with(POWERED, world.isBlockPowered(pos));
 		Direction side = context.getFace();
 
+		// we cannot connect upwards, so done here
+		if (side == Direction.DOWN) {
+			return state;
+		}
 		// if placed on the top face, try to connect down
 		if (side == Direction.UP) {
 			return state.with(DOWN, canConnect(world, pos, Direction.DOWN));
 		}
 
 		// if placed on a fluid handler, connect to that
 		ChannelConnection connection = ChannelConnection.NONE;
-		if (side != Direction.DOWN) {
-			BlockPos placedOn = pos.offset(side.getOpposite());
-			// on another channel means in or out
-			if (world.getBlockState(placedOn).isIn(this)) {
-				PlayerEntity player = context.getPlayer();
-				connection = player != null && player.isSneaking() ? ChannelConnection.IN : ChannelConnection.OUT;
-			} else if (isFluidHandler(world, side, placedOn)) {
-				connection = ChannelConnection.OUT;
-			}
+		BlockPos placedOn = pos.offset(side.getOpposite());
+		// on another channel means in or out
+		if (world.getBlockState(placedOn).isIn(this)) {
+			PlayerEntity player = context.getPlayer();
+			connection = player != null && player.isSneaking() ? ChannelConnection.IN : ChannelConnection.OUT;
+		} else if (isFluidHandler(world, side, placedOn)) {
+			connection = ChannelConnection.OUT;
 		}
 		return state.with(DIRECTION_MAP.get(side.getOpposite()), connection);
 	}