& btunderrepair()
 
  Syntax: btunderrepair(<UnitDB>)
 
  This function returns a value of '1' if the specified mech is under 
  repair, and '0' if it is not.
 
  Error Messages:
 
  * If <UnitDB> is not a valid RS unit the function will return #-2
  * For any other error the function will return #-1 
 
  Example:
 
  > think btunderrepair(#2983)
  1
  > think btunderrepair(#1024)
  0