Handle repeating keycodes

Initialize "repeat" count on key events.

PR #1519 <https://github.com/Genymobile/scrcpy/pull/1519>
Refs #1013 <https://github.com/Genymobile/scrcpy/pull/1013>

Signed-off-by: Romain Vimont <rom@rom1v.com>

app/src/scrcpy.c

@@ -48,6 +48,7 @@ static struct input_manager input_manager = {
     .controller = &controller,
     .video_buffer = &video_buffer,
     .screen = &screen,
+    .repeat = 0,
     .prefer_text = false, // initialized later
 };