Package Manager's queue can't be set to nil anymore.

Author: NickyWeber

cocos2d/CCPackageManager.h

@@ -32,6 +32,7 @@
 /**
  *  The queue on which unzipping of packages is achieved, default is DISPATCH_QUEUE_PRIORITY_LOW.
  *  On iOS 5.0, MacOS 10.7 and below you have to get rid of the queue after use if it's not a global one.
+ *  If set to nil, queue will be reset to default.
  */
 #if OS_OBJECT_HAVE_OBJC_SUPPORT == 1
 @property (nonatomic, strong) dispatch_queue_t unzippingQueue;

cocos2d/CCPackageManager.m

@@ -204,6 +204,17 @@ - (void)setInstalledPackagesPath:(NSString *)installedPackagesPath
     [self didChangeValueForKey:@"installedPackagesPath"];
 }
 
+- (void)setUnzippingQueue:(dispatch_queue_t)unzippingQueue
+{
+    if (!unzippingQueue)
+    {
+        _unzippingQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_LOW, 0);
+        return;
+    }
+
+    _unzippingQueue = unzippingQueue;
+}
+
 
 #pragma mark - download