[LyX/master] Apple recommends the use of drain instead of calling release for NSAutoreleasePool objects

[Stephan Witt]

commit 024e1175dc84a08c954cee3a3c27d108210b8256
Author: Stephan Witt <sw...@lyx.org>
Date:   Sat Apr 19 18:27:14 2014 +0200

    Apple recommends the use of drain instead of calling release for 
NSAutoreleasePool objects

diff --git a/src/support/linkback/LinkBackProxy.m 
b/src/support/linkback/LinkBackProxy.m
index 1e77d94..8112b31 100644
--- a/src/support/linkback/LinkBackProxy.m
+++ b/src/support/linkback/LinkBackProxy.m
@@ -236,7 +236,7 @@ void closeAllLinkBackLinks()
        [linkBackClient release];
        linkBackClient = nil;
        
-       [pool release];
+       [pool drain];
        pool = nil;
 }