Fix add nzb twice in sab
Fix add nzb twice in sab

cloeses https://github.com/styxit/HTPC-Manager/issues/81

Dahlgren/HTPC-Manager,clausqr/HTPC-Manager,Dahlgren/HTPC-Manager,Kussie/HTPC-Manager,iAmMrinal0/HTPC-Manager,Hellowlol/HTPC-Manager,clausqr/HTPC-Manager,Dahlgren/HTPC-Manager,Dahlgren/HTPC-Manager,Kussie/HTPC-Manager,Hellowlol/HTPC-Manager,clausqr/HTPC-Manager,styxit/HTPC-Manager,Kussie/HTPC-Manager,styxit/HTPC-Manager,clausqr/HTPC-Manager,Hellowlol/HTPC-Manager,raysguy/HTPC-Manager,styxit/HTPC-Manager,styxit/HTPC-Manager,raysguy/HTPC-Manager,iAmMrinal0/HTPC-Manager,raysguy/HTPC-Manager,Kussie/HTPC-Manager,Kussie/HTPC-Manager,Dahlgren/HTPC-Manager,clausqr/HTPC-Manager,iAmMrinal0/HTPC-Manager,iAmMrinal0/HTPC-Manager,raysguy/HTPC-Manager,raysguy/HTPC-Manager,iAmMrinal0/HTPC-Manager,Hellowlol/HTPC-Manager