ffplay: increase AV_SYNC_THRESHOLD_MIN to 0.04

Less than 0.04 sec delays should not be noticable, and it helps us with 50fps
content where some timing errors can cause a frame dup where it is not really
necessary.

Signed-off-by: Marton Balint <cus@passwd.hu>

ffplay.c

@@ -72,7 +72,7 @@ const int program_birth_year = 2003;
 #define SDL_AUDIO_BUFFER_SIZE 1024
 
 /* no AV sync correction is done if below the minimum AV sync threshold */
-#define AV_SYNC_THRESHOLD_MIN 0.01
+#define AV_SYNC_THRESHOLD_MIN 0.04
 /* AV sync correction is done if above the maximum AV sync threshold */
 #define AV_SYNC_THRESHOLD_MAX 0.1
 /* If a frame duration is longer than this, it will not be duplicated to compensate AV sync */