Missing null check in oven canSmelt()

[Glease]

Missing check for null output slot in

WitcheryExtras/src/java/alkalus/main/core/util/WitchesOvenUtils.java

Line 197 in e2081d4

if (!getOutputSlot(aTile).isItemEqual(itemstack)) {

WitcheryExtras/src/java/alkalus/main/core/util/WitchesOvenUtils.java

Line 200 in e2081d4

final int result = getOutputSlot(aTile).stackSize + itemstack.stackSize;