local network: fix crash on opening the VC by making sure that we provide a proper string to the UPnP library

Sources/VLCLocalServerListViewController.m

@@ -239,7 +239,7 @@
     [[managerInstance DB] addObserver:self];
 
     //Optional; set User Agent
-    [[managerInstance SSDP] setUserAgentProduct:[NSString stringWithFormat:@"VLCforiOS/%@", [[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleVersion"]] andOS:[NSString stringWithFormat:@"iOS/%@", [[UIDevice currentDevice] systemVersion]]];
+    [[managerInstance SSDP] setUserAgentProduct:[NSString stringWithFormat:@"VLCforiOS/%@", [[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleShortVersionString"]] andOS:[NSString stringWithFormat:@"iOS/%@", [[UIDevice currentDevice] systemVersion]]];
 
     //Search for UPnP Devices
     [[managerInstance SSDP] startSSDP];