Error logic and updated message

Checks to see if the episode selected is in the list of scraped episodes
available for that show and season. Updated error message to reflect
result

ani-cli

@@ -193,7 +193,11 @@ get_episode_url() {
     links=$(cat "$cache_dir"/* | sed 's|^Mp4-||g;/http/!d;/Alt/d' | sort -g -r -s)
     rm -r "$cache_dir"
     episode=$(select_quality "$quality")
-    [ -z "$episode" ] && die "Episode not released!"
+    if echo "$ep_list" | grep -q "^$ep_no$"; then
+        [ -z "$episode" ] && die "Episode is released, but no valid sources!"
+    else
+        [ -z "$episode" ] && die "Episode not released!"
+    fi
 }
 
 # search the query and give results