From e35a88fdef629b35f8d9706b2ad92c5289485f58 Mon Sep 17 00:00:00 2001
From: ap4y <lod@pisem.net>
Date: Fri, 21 Sep 2012 17:22:07 +0400
Subject: [PATCH] Preventing negative values for the activity indicator counter

---
 AFNetworking/AFNetworkActivityIndicatorManager.m | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/AFNetworking/AFNetworkActivityIndicatorManager.m b/AFNetworking/AFNetworkActivityIndicatorManager.m
index 5672773..ec3eabc 100644
--- a/AFNetworking/AFNetworkActivityIndicatorManager.m
+++ b/AFNetworking/AFNetworkActivityIndicatorManager.m
@@ -118,6 +118,9 @@ static NSTimeInterval const kAFNetworkActivityIndicatorInvisibilityDelay = 0.17;
 }
 
 - (void)decrementActivityCount {
+    if (_activityCount == 0) {
+        return;
+    }
     [self willChangeValueForKey:@"activityCount"];
 	@synchronized(self) {
 		_activityCount--;