playback: fix skip backward rewind w/enabled

New player setup accidentally broke rewind at beginning behavior when
rewind before skip is off.

Resolves #785

CHANGELOG.md

@@ -12,6 +12,8 @@
 
 #### What's Fixed
 - Fixed repeat mode not restoring on startup
+- Fixed rewinding not occuring when skipping back at the beginning of the queue if
+rewind before skipping was turned off
 
 #### What's Changed
 - For the time being, the media notification will not follow Album Covers or 1:1 Covers settings

app/src/main/java/org/oxycblt/auxio/playback/service/ExoPlaybackStateHolder.kt

@@ -270,8 +270,10 @@ class ExoPlaybackStateHolder(
     override fun prev() {
         if (playbackSettings.rewindWithPrev) {
             player.seekToPrevious()
-        } else {
+        } else if (player.hasPreviousMediaItem()) {
             player.seekToPreviousMediaItem()
+        } else {
+            player.seekTo(0)
         }
         if (!playbackSettings.rememberPause) {
             player.play()