Changes

Summary

1. Fix #194 Allow null in item rotations (commit: 5768121) (details)

Commit 57681213c8486015bc59bf78a68b76f79a056b97 by mezz Fix #194 Allow null in item rotations (commit: 5768121)
	src/main/java/mezz/jei/util/ErrorUtil.java (diff)
	src/main/java/mezz/jei/gui/ingredients/GuiIngredientGroup.java (diff)
	src/main/java/mezz/jei/util/RecipeMap.java (diff)
	src/main/java/mezz/jei/util/StackHelper.java (diff)