This patch fixes a bug with the recently added printk-times feature.

In the case where a printk consists of only the log level (followed
subsequently by printks with more text for the same line), the printk-times
code doesn't correctly recognize the end of the string, and starts emitting
chars at the 0 byte at the end of the string.

The patch below fixes this problem.  It also adjusts the handling of
printed_len in the routine, which was affected by the printk-times feature.
Signed-off-by: Tim Bird <tim.bird@am.sony.com>
Acked-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>