From ff8d2cc20f9a7b8918ebebc6271064ecb109918b Mon Sep 17 00:00:00 2001
From: Milos Jakovljevic <milos1290@users.noreply.github.com>
Date: Tue, 21 Nov 2017 03:56:29 +0100
Subject: [PATCH] Fixing crash in Allocator if there are no allocated pages
 (#12908)

---
 cocos/base/allocator/CCAllocatorStrategyFixedBlock.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/cocos/base/allocator/CCAllocatorStrategyFixedBlock.h b/cocos/base/allocator/CCAllocatorStrategyFixedBlock.h
index 40067fbe4d..1e571480c7 100644
--- a/cocos/base/allocator/CCAllocatorStrategyFixedBlock.h
+++ b/cocos/base/allocator/CCAllocatorStrategyFixedBlock.h
@@ -89,14 +89,13 @@ public:
         AllocatorDiagnostics::instance()->untrackAllocator(this);
 #endif
 
-        do
+        while (_pages)
         {
             intptr_t* page = (intptr_t*)_pages;
             intptr_t* next = (intptr_t*)*page;
             ccAllocatorGlobal.deallocate(page);
             _pages = (void*)next;
         }
-        while (_pages);
     }
     
     // @brief