Found by grepping for pointer casts.
Some additional cast can be removed if hexify/unhexify arguments are
changed to a more suitable type.
Change-Id: I13796b056f00976979bf0e754de3aa7648f7f321
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/1778
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>