Null check... Closes #870

src/main/java/vazkii/botania/api/package-info.java

@@ -1,4 +1,4 @@
-@API(owner = "Botania", apiVersion = "46", provides = "BotaniaAPI")
+@API(owner = "Botania", apiVersion = "47", provides = "BotaniaAPI")
 package vazkii.botania.api;
 import cpw.mods.fml.common.API;
 

src/main/java/vazkii/botania/api/subtile/SubTileFunctional.java

@@ -105,7 +105,7 @@ public class SubTileFunctional extends SubTileEntity {
 		}
 	}
 
-	if(!needsNew) {
+	if(!needsNew && linkedPool != null) {
 		TileEntity tileAt = supertile.getWorldObj().getTileEntity(linkedPool.xCoord, linkedPool.yCoord, linkedPool.zCoord);
 		if(!(tileAt instanceof IManaPool)) {
 			linkedPool = null;

src/main/java/vazkii/botania/api/subtile/SubTileGenerating.java

@@ -98,7 +98,7 @@ public class SubTileGenerating extends SubTileEntity {
 			}
 		}
 
-		if(!needsNew) {
+		if(!needsNew && linkedCollector != null) {
 			TileEntity tileAt = supertile.getWorldObj().getTileEntity(linkedCollector.xCoord, linkedCollector.yCoord, linkedCollector.zCoord);
 			if(!(tileAt instanceof IManaCollector)) {
 				linkedCollector = null;