channels are uint64 not int64 - typo fix

direct/src/dcparser/dcPacker.h

@@ -153,7 +153,7 @@ PUBLISHED:
 
 // this is a hack to allw me to get in and out of 32bit Mode Faster
 // need to agree with channel_type in dcbase.h
-#define RAW_PACK_CHANNEL(in)  raw_pack_int64(in)
+#define RAW_PACK_CHANNEL(in)  raw_pack_uint64(in)
   
 
   INLINE int raw_unpack_int8();