[Audio Processing] Increase thread stack size

Apparently, all these new changes with FreeSurround have pushed the
default 512KB thread stack size to the limit. And I'm not even using
stack variables, really, except for maybe the autoreleasepools.

Signed-off-by: Christopher Snowhill <kode54@gmail.com>

Audio/Chain/Node.m

@@ -211,7 +211,9 @@
 }
 
 - (void)launchThread {
-	[NSThread detachNewThreadSelector:@selector(threadEntry:) toTarget:self withObject:nil];
+	NSThread *thread = [[NSThread alloc] initWithTarget:self selector:@selector(threadEntry:) object:nil];
+	[thread setStackSize:1024 * 1024]; // Dammit, this new code makes the nodes overflow the stack size, so let's double the stack
+	[thread start];
 }
 
 - (void)setPreviousNode:(id)p {