[Translators] Updated Slovak translation for VLC

[Marián Hikaník]

Hello, 
I prepared a small update for Slovak translation of VLC. The language file was downloaded from http://git.videolan.org/?p=vlc.git;a=tree;f=po;hb=1.0-bugfix   and translated to 100 %. 

The new language file is uploaded on: http://www.mojepreklady.net/download/po_sk.zip

Please download the new file and update it on your servers. Thank you very much in advance. Best regards, 
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Marián Hikaník