+ Changed the method used to force a context switch within an ISR for the
ARM7/9 GCC ports only. The portENTER_SWITCHING_ISR() and
portEXIT_SWITCHING_ISR() macros are no longer supported. This is to
ensure correct behaviour no matter which GCC version is used, with or
without the -fomit-frame-pointer option, and at all optimisation levels.
+ Corrected the prototype for xQueueGenericSend() within queue.h.
Richard Barry