refs #5240, small simplification

git-svn-id: file:///svn/toku/tokudb@45627 c7de825b-a66e-492c-adef-691d508d4ae1

ft/rwlock.h

@@ -107,13 +107,11 @@ static inline void rwlock_write_unlock(RWLOCK rwlock) {
     assert(rwlock->reader == 0);
     assert(rwlock->writer == 1);
     rwlock->writer--;
-    if (rwlock->writer == 0) {
     if (rwlock->want_write) {
         toku_cond_signal(&rwlock->wait_write);
     } else if (rwlock->want_read) {
         toku_cond_broadcast(&rwlock->wait_read);
     }
-    }
 }
 
 // returns: the number of readers