Make the parameters to vPortDefineHeapRegions() const.
Add additional asserts to the Keil CM3 and CM4F ports (other CM3/4 ports already updated).
Add the additional yield necessitated by the mutex held count to the case when configUSE_QUEUE_SETS is 0.


git-svn-id: http://svn.code.sf.net/p/freertos/code/trunk@2271 1d2547de-c912-0410-9cb9-b8ca96c0e9e2