Two minor fixes

[Maritsu]

I'm somewhat ashamed to have made such a trivial oversight, but yet here I am. This PR:

• fixes a crash when no search results are found for a song by retrying without the "songs only" filter (introduced by Various search improvements #375).

On top of that, included is a fix for Maritsu@e05d9e4#commitcomment-144139425 (shutil.SameFileError when moving reference log).

[sentry-io]

🔍 Existing Issues For Review

Your pull request is modifying functions with the following pre-existing issues:

📄 File: spotify_dl/youtube.py

Function	Unhandled Issue
download_songs	SameFileError: 'download_list.log' and './download_list.log' are the same file spotif... Event Count: 6
download_songs	ValueError: not enough values to unpack (expected 2, got 0) spotify_dl.youtube in find_and_dow... Event Count: 2
download_songs	NameError: name 'd' is not defined spotify_dl.you... Event Count: 2
download_songs	FileNotFoundError: [Errno 2] No such file or directory: './download_list.log' spotify_dl.youtu... Event Count: 2
download_songs	NameError: name 'size' is not defined spotify_dl.... Event Count: 1

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[SathyaBhat]

all good mate no worries and thanks for the fix @Maritsu

[sentry-io]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ IndexError: list index out of range spotify_dl.youtube in <lambda> View Issue

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