Fix wrong songs playing when queue is not empty

if we are playing a song which is in the middle of somewhere in queue.
it will play the wrong song, since the index points to wrong song

1 files changed, 3 insertions, 1 deletions

diff --git a/src/list.rs b/src/list.rs
index d5d5524..452907d 100755
--- a/src/list.rs
+++ b/src/list.rs
@@ -27,7 +27,9 @@ impl<T> ContentList<T> {
 
     /// Go to previous item in list
     pub fn prev(&mut self) {
-        if self.index != 0 {
+        if self.index == 0 {
+            self.index = self.list.len() - 1;
+        } else  {
             self.index -= 1;
         }
     }