fixes #34

getAllIngredients() can contain nulls

src/main/java/appeng/integration/modules/jei/RecipeTransferHandler.java

@@ -149,6 +149,10 @@ class RecipeTransferHandler<T extends Container> implements IRecipeTransferHandl
 						// prefer pure crystals.
 						for ( ItemStack stack : ingredient.getAllIngredients() )
 						{
+							if( stack == null )
+							{
+								continue;
+							}
 							if( Platform.isRecipePrioritized( stack ) )
 							{
 								list.add( 0, stack );