fix gcc 4.7.x warnings

Origin commit data
------------------
Commit: 3544901636
Author: Jacek Jendrzej <overx300@gmail.com>
Date: 2012-07-09 (Mon, 09 Jul 2012)

src/driver/record.h

@@ -71,7 +71,7 @@ class CRecordInstance
 {
 	private:
 		typedef struct {
-			unsigned short apid;
+			uint32_t apid;
 			unsigned int index;//FIXME not used ?
 			bool ac3;
 		} APIDDesc;

src/system/lastchannel.h

@@ -34,7 +34,7 @@ class CLastChannel
 		{
 			int             channel;
 			t_channel_id channel_id;
-			unsigned long   timestamp;
+			long int   timestamp;
 			int channel_mode;
 		};