Reduce fruit amounts, increase nutrition.

It seemed that the amount of fruit generated after the change was
a bit too much, so the average stack size is being reduced while
increasing the nutrition to keep spriggans around the same while
trying to bring Fedhas back to around where things were before.

For reference, this is the old version, with, in order, nutrition,
herbivore III nutrition, occurence out of 100 (times stack size),
and average spriggan nutrition from it per 100 food items generated:

250 | 400  | 10*(d13) | 28000

and now:

850 | 1000 | 10*(d5)  | 30000

1 files changed, 1 insertions, 1 deletions

diff --git a/crawl-ref/source/makeitem.cc b/crawl-ref/source/makeitem.cc
index 1ea34aee90..4306c8bf86 100644
--- a/crawl-ref/source/makeitem.cc
+++ b/crawl-ref/source/makeitem.cc
@@ -2242,7 +2242,7 @@ static void _generate_food_item(item_def& item, int force_quant, int force_type)
                 item.quantity += random2(3);
 
             if (is_fruit(item))
-                item.quantity += random2avg(13,2);
+                item.quantity += random2avg(5,2);
         }
     }
 }