thumbs.rb: fix error on Playlist.append due to args not int
[melted] / mlt++ / swig /
drwxr-xr-x   ..
-rw-r--r-- 208 Makefile
-rwxr-xr-x 686 configure
drwxr-xr-x - java
-rw-r--r-- 3677 mltpp.i
drwxr-xr-x - perl
drwxr-xr-x - python
drwxr-xr-x - ruby
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