Fix some compilation error when both TICKLESS mode and the SPORADIC scheduler are enabled

sched/sched/sched_timerexpiration.c

@@ -73,7 +73,7 @@
 
 #define KEEP_ALIVE_HACK 1
 
-#ifdef CONFIG_RR_INTERVAL > 0
+#if CONFIG_RR_INTERVAL > 0
 #  define KEEP_ALIVE_TICKS MSEC2TICK(CONFIG_RR_INTERVAL)
 #else
 #  define KEEP_ALIVE_TICKS MSEC2TICK(50)
@@ -284,7 +284,7 @@ static inline uint32_t sched_process_scheduler(uint32_t ticks, bool noswitches)
 
   if (rtcb != ntcb)
     {
-       return sched_process_scheduler(0, true)
+       return sched_process_scheduler(0, true);
     }
 
   /* Returning zero means that there is no interesting event to be timed */
@@ -294,9 +294,9 @@ static inline uint32_t sched_process_scheduler(uint32_t ticks, bool noswitches)
     {
       /* Apply the keep alive hack */
 
-      return KEEP_ALIVE_TICKS
+      return KEEP_ALIVE_TICKS;
     }
-#else
+#endif
 
   return ret;
 }

sched/sched/sched_unlock.c

@@ -156,7 +156,7 @@ int sched_unlock(void)
                * change the currently active task.
                */
 
-              if (rtcb = (FAR struct tcb_s*)g_readytorun.head)
+              if (rtcb == (FAR struct tcb_s*)g_readytorun.head)
                 {
                   sched_timer_reassess();
                 }