Fixed crash when corporea funnels or interceptors have empty item frames. Closes #897

src/main/java/vazkii/botania/common/block/tile/corporea/TileCorporeaFunnel.java

@@ -70,9 +70,12 @@ public class TileCorporeaFunnel extends TileCorporeaBase {
 			for(EntityItemFrame frame : frames) {
 				int orientation = frame.hangingDirection;
 				if(orientationToDir[orientation] == dir.ordinal()) {
-					ItemStack copy = frame.getDisplayedItem().copy();
-					copy.stackSize = rotationToStackSize[frame.getRotation()];
-					filter.add(copy);
+					ItemStack stack = frame.getDisplayedItem();
+					if(stack != null) {
+						ItemStack copy = stack.copy();
+						copy.stackSize = rotationToStackSize[frame.getRotation()];
+						filter.add(copy);
+					}
 				}
 			}
 		}

src/main/java/vazkii/botania/common/block/tile/corporea/TileCorporeaInterceptor.java

@@ -65,6 +65,9 @@ public class TileCorporeaInterceptor extends TileCorporeaBase implements ICorpor
 	}
 
 	public boolean requestMatches(Object request, ItemStack filter) {
+		if(filter == null)
+			return false;
+		
 		if(request instanceof ItemStack) {
 			ItemStack stack = (ItemStack) request;
 			return stack != null && stack.isItemEqual(filter) && ItemStack.areItemStacksEqual(filter, stack);