Fix video recording sync drift (patch refactored but original author unknown)

code/client/client.h

@@ -233,6 +233,9 @@ typedef struct {
 	int			timeDemoMaxDuration;	// maximum frame duration
 	unsigned char	timeDemoDurations[ MAX_TIMEDEMO_DURATIONS ];	// log of frame durations
 
+	float		aviVideoFrameRemainder;
+	float		aviSoundFrameRemainder;
+
 #ifdef USE_VOIP
 	qboolean voipEnabled;
 	qboolean speexInitialized;