- don't needlessly export this function
 - handle "case 0" debug method-of-entry better (silent by default)

The "case 0" is a valid debug entry mode so it doesn't deserve the
warning int now gets.  But it probably means that OpenOCD confused
itself somehow; or that it confused the ARM9EJS target.


git-svn-id: svn://svn.berlios.de/openocd/trunk@2799 b42882b7-edfa-0310-969c-e2dbd0fdcd60