From bcbb7e6029b672cbbbd772700b62a9e404fee428 Mon Sep 17 00:00:00 2001
From: Slavik Romanuk <net.highlander@gmail.com>
Date: Fri, 8 Feb 2013 14:03:07 +0200
Subject: [PATCH] Fixing crash if effect's target was nil.

---
 framework/Source/GPUImageFilter.m | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/framework/Source/GPUImageFilter.m b/framework/Source/GPUImageFilter.m
index 5aca18ccf..5575dc9fb 100755
--- a/framework/Source/GPUImageFilter.m
+++ b/framework/Source/GPUImageFilter.m
@@ -157,7 +157,10 @@ void dataProviderUnlockCallback (void *info, const void *data, size_t size)
     GPUImageFilter *filter = (__bridge_transfer GPUImageFilter*)info;
     
     CVPixelBufferUnlockBaseAddress([filter renderTarget], 0);
-    CFRelease([filter renderTarget]);
+    
+    if ([filter renderTarget]) {
+	CFRelease([filter renderTarget]);
+    }
 
     [filter destroyFilterFBO];