Groups no longer derp out when a single option is missing.

recipes/GroupIngredient.java

@@ -65,8 +65,17 @@ public class GroupIngredient implements IIngredient
 		try
 		{
 			for (IIngredient i : ingredients)
+			{
+				try
+				{
 					out.addAll( Arrays.asList( i.getItemStackSet() ) );
 				}
+				catch (MissingIngredientError mir)
+				{
+					// oh well this is a group!
+				}
+			}
+		}
 		finally
 		{
 			isInside = false;