avfilter/af_silencedetect: change mono default to integer literal

Signed-off-by: Limin Wang <lance.lmwang@gmail.com>
Reviewed-by: Gyan Doshi <ffmpeg@gyani.pro>

libavfilter/af_silencedetect.c

@@ -58,8 +58,8 @@ static const AVOption silencedetect_options[] = {
     { "noise",     "set noise tolerance",              OFFSET(noise),     AV_OPT_TYPE_DOUBLE, {.dbl=0.001},          0, DBL_MAX,  FLAGS },
     { "d",         "set minimum duration in seconds",  OFFSET(duration),  AV_OPT_TYPE_DURATION, {.i64=2000000},      0, MAX_DURATION,FLAGS },
     { "duration",  "set minimum duration in seconds",  OFFSET(duration),  AV_OPT_TYPE_DURATION, {.i64=2000000},      0, MAX_DURATION,FLAGS },
-    { "mono",      "check each channel separately",    OFFSET(mono),      AV_OPT_TYPE_BOOL,   {.i64=0.},             0, 1,        FLAGS },
-    { "m",         "check each channel separately",    OFFSET(mono),      AV_OPT_TYPE_BOOL,   {.i64=0.},             0, 1,        FLAGS },
+    { "mono",      "check each channel separately",    OFFSET(mono),      AV_OPT_TYPE_BOOL,   {.i64=0},              0, 1,        FLAGS },
+    { "m",         "check each channel separately",    OFFSET(mono),      AV_OPT_TYPE_BOOL,   {.i64=0},              0, 1,        FLAGS },
     { NULL }
 };