Fix hitch when opening Team Arena find friend menu

Opening the find friend menu in the Team Arena server browser
hitches due to trying to resolve blank host names.

In UI_BuildFindPlayerList() status requests that are initial or
completed state or have timed out get reset. This means it starts
with MAX_SERVERSTATUSREQUESTS (16) blank host names. So just ignore
them in UI_GetServerStatusInfo().

code/ui/ui_main.c

@@ -3920,11 +3920,21 @@ static int UI_GetServerStatusInfo( const char *serverAddress, serverStatusInfo_t
 	char *p, *score, *ping, *name;
 	int i, len;
 
+	if (info) {
+		memset(info, 0, sizeof(*info));
+	}
+
+	// ignore initial unset addresses
+	if (serverAddress && *serverAddress == '\0') {
+		return qfalse;
+	}
+
+	// reset server status request for this address
 	if (!info) {
 		trap_LAN_ServerStatus( serverAddress, NULL, 0);
 		return qfalse;
 	}
-	memset(info, 0, sizeof(*info));
+
 	if ( trap_LAN_ServerStatus( serverAddress, info->text, sizeof(info->text)) ) {
 		Q_strncpyz(info->address, serverAddress, sizeof(info->address));
 		p = info->text;