Half-assed error handling for unbalanced lock/unlock

src/xpdev/rwlockwrap.c

@@ -117,9 +117,12 @@ rwlock_unlock(rwlock_t *lock)
 		LeaveCriticalSection(&lock->lk);
 		return false;
 	}
+	if (lock->readers) {
 		lock->readers--;
 		return true;
 	}
+	return false;
+}
 
 #elif defined(__unix__)