Clocking in the current task should clock it out first

[Daniel Clemente <n142857@gmail.com>]

Hi,
  in recent org-modes a new behaviour was added: when doing C-c C-x
C-i on the current task, it isn't clocked out first. It shows the
message „Clock continues in "[task]"“ and adds a new line for the
clock in.
  This creates a clock section like:

#+BEGIN_EXAMPLE
*** after pressing many successive C-c C-x C-i …
	:CLOCK:
	CLOCK: [2010-03-17 dc 10:25]--[2010-03-17 dc 10:30] =>  0:05
	CLOCK: [2010-03-17 dc 10:20]
	CLOCK: [2010-03-17 dc 10:20]
	CLOCK: [2010-03-17 dc 10:20]
	CLOCK: [2010-03-17 dc 10:20]
	CLOCK: [2010-03-17 dc 10:20]
	CLOCK: [2010-03-17 dc 10:20]
	CLOCK: [2010-03-12 dv 16:38]--[2010-03-12 dv 16:39] =>  0:01
	:END:
#+END_EXAMPLE


  They are later correctly found to be dangling clocks.
  I presume this is a bug?

Daniel