Add use of portPOINTER_SIZE_TYPE to tasks.c to facilitate the removal of warnings when the pointer size is less than 32 bits.

Source/include/FreeRTOS.h

@@ -242,6 +242,9 @@ typedef portBASE_TYPE (*pdTASK_HOOK_CODE)( void * );
 	#define vQueueUnregisterQueue( xQueue )
 #endif
 
+#ifndef portPOINTER_SIZE_TYPE
+	#define portPOINTER_SIZE_TYPE unsigned long
+#endif
 
 /* Remove any unused trace macros. */
 #ifndef traceSTART