Fix build with compilers older than Apple Clang 4.0 by not using Objective-C array literals
https://github.com/karelia/CurlHandle/issues/8
--- CURLFTPSession.m.orig 2012-11-29 08:34:27.000000000 -0600
+++ CURLFTPSession.m 2013-03-11 20:07:51.000000000 -0500
NSString *from = [NSString stringWithFormat:@"RNFR %@", [fromPath lastPathComponent]];
NSString *to = [NSString stringWithFormat:@"RNTO %@", toPath];
- return [self executeCustomCommands:@[from, to]
+ id commands[] = {from, to};
+ return [self executeCustomCommands:[NSArray arrayWithObjects:commands count:2]
inDirectory:[fromPath stringByDeletingLastPathComponent]
createIntermediateDirectories:NO