- safety: again fix for helicopter NUMBER_MOTOR   1 , DO  NOT SET TO 2, OR IT WILL BREAK SERVO7 USED FOR SWASH
- safety: make powerpin d12 (for oldschool wmp) off by default - else may break servo. WMP users now must activate 
it if so required.
- safety: for airplane, set default to disable servo for throttle ; else high-rev spinning rotor upon arm
- servo: turn some vars into static; reduces memory use



git-svn-id: http://multiwii.googlecode.com/svn/trunk/MultiWii_shared@1436 02679b44-d973-9852-f2fa-63770883b36c