This patch modifies an error message which, in its original state,
I find somewhat unhelpful. So a small hint was added.

Signed-off-by: Johnny Halfmoon <jhalfmoon at milksnot.com>


git-svn-id: svn://svn.berlios.de/openocd/trunk@2738 b42882b7-edfa-0310-969c-e2dbd0fdcd60