[Translators] Update for Slovak translation of VLC

[Marián Hikaník]

Hello, 
I send you update for Slovak translation of VLC. The translation is now complete again. Please merge this translation with git repository. You can download the updated file from: http://www.mojepreklady.net/download/po-sk.zip. 

The file for translation was downloaded from: http://git.videolan.org/?p=vlc/vlc-1.1.git;a=tree;f=po (only for information). 

Best regards, 

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Marián Hikaník