Start with a level 1 spell and enough power

Ensure the first spell - if any - given to the hero in initial
inventory is level 1 - otherwise you can end up with a situation
where the hero knows level 3 spells, but won't have enough power
to cast them.

If the hero starts out with a spell, ensure enough power (5)
to cast that level 1 spell.

doc/fixes3-7-0.txt

@@ -807,6 +807,8 @@ flint and hard gems break less often when thrown
 hobbits getting a sling also get some ammo for it
 elves and rangers get alignment penalty for cutting down trees
 casting a forgotten spell uses some random amount of power
+heroes starting with a spell have at least one level one spell, and
+	have just enough power to cast it
 
 
 Fixes to 3.7.0-x Problems that Were Exposed Via git Repository