have #jump cast "jumping"

Requested during beta testing:  if hero can't jump, have #jump command
attempt to cast the jumping spell.  This is similar to how #unturn and
^T cast spells when used while lacking the innate ability.

doc/fixes36.1

@@ -69,6 +69,8 @@ naming Sting or Orcrist now breaks illiterate conduct
 different feedback for reading a scroll of mail created by writing with marker
 wizard mode #wizintrinsic
 reading non-cursed scroll of enchant weapon uncurses welded tin opener
+if hero has no jumping ability but knows the jumping spell, the #jump command
+	will attempt to cast the spell
 
 
 Platform- and/or Interface-Specific New Features