atexit() functions now called when task killed by task delete; For MCUs with <= 64Kb of SRAM, CONFIG_MM_SMALL can be defined to reduce the memory allocation overhead

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3648 42af7a65-404d-4744-a932-0658087f49c3

include/nuttx/sched.h

@@ -137,7 +137,7 @@ typedef union entry_u entry_t;
  * (if registered via atexit()).
  */
 
-#ifdef CONFIG_SCHED_ATEXT
+#ifdef CONFIG_SCHED_ATEXIT
 typedef void (*exitfunc_t)(void);
 #endif
 
@@ -184,7 +184,7 @@ struct _TCB
   pid_t    pid;                          /* This is the ID of the thread        */
   start_t  start;                        /* Thread start function               */
   entry_t  entry;                        /* Entry Point into the thread         */
-#ifdef CONFIG_SCHED_ATEXT
+#ifdef CONFIG_SCHED_ATEXIT
   exitfunc_t exitfunc;                   /* Called if exit is called.           */
 #endif
 #ifdef CONFIG_SCHED_WAITPID /* Experimental */