small syntax changes, mostly

kern/thread/synch.c

@@ -162,6 +162,7 @@ struct lock * lock_create(const char * name)
   
   if (lock->lk_name == NULL || wc == NULL)
   {
+    kfree(lock->lk_name);
     kfree(lock);
     kfree(wc);
     return NULL;
@@ -217,9 +218,7 @@ bool lock_do_i_hold(struct lock * lock)
 {
   KASSERT(lock);
   
-  if (lock->owner == curthread) return 1;
-  
-  return 0;
+  return (lock->owner == curthread);
 }
 
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