Cog Audio: Allocate maximum needed audio memory

The chunk could be any format, up to floating point double samples, and
up to 18 channels.

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

Audio/Chain/InputNode.m

@@ -134,7 +134,7 @@
 - (void)process {
 	int amountInBuffer = 0;
 	int bytesInBuffer = 0;
-	void *inputBuffer = malloc(CHUNK_SIZE * 18); // Maximum 18 channels, dunno what we'll receive
+	void *inputBuffer = malloc(CHUNK_SIZE * 8 * 18); // Maximum 18 channels, dunno what we'll receive
 
 	BOOL shouldClose = YES;
 	BOOL seekError = NO;