Slightly simpler way to shrink and item stack in the catalyst hatch

src/main/java/com/zorbatron/zbgt/common/metatileentities/multi/multiblockpart/MetaTileEntityCatalystHatch.java

@@ -163,7 +163,7 @@ private void moveItemsFromStockToUsage(IItemHandlerModifiable src, IItemHandlerM
             }
 
             if (didSet) {
-                srcStack.setCount(srcStack.getCount() - 1);
+                srcStack.shrink(1);
             }
         }
     }