pthread_create: Fix an (unlikely) error in fallback value in the event of a failure (which should never occur)

ChangeLog

@@ -10754,3 +10754,5 @@
 	* include/nuttx/sched.h, sched/, and fs/procfs:  Increase the size of
 	  the scheduling policy field from 1 to 2 bits to allow additional,
 	  planned scheduling policies (2015-07-23).
+	* pthread_create: Fix an (unlikely) error in fallback value in the
+	  event of a failure (which should never occur) (2015-07-23).

sched/pthread/pthread_create.c

@@ -324,7 +324,7 @@ int pthread_create(FAR pthread_t *thread, FAR const pthread_attr_t *attr,
         }
       else
         {
-          priority = SCHED_FIFO;
+          priority = PTHREAD_DEFAULT_PRIORITY;
         }
 
 #if CONFIG_RR_INTERVAL > 0