linuxdvb: use DTV_LNA only when set, fixes #2807

diff --git a/src/input/mpegts/linuxdvb/linuxdvb_frontend.c b/src/input/mpegts/linuxdvb/linuxdvb_frontend.c
index 1bdcc76e5513baa985d14cece0c3aa8f7aac4da6..211a4eac02bc741c0b1fc561cbb774ec2a171609 100644 (file)
--- a/src/input/mpegts/linuxdvb/linuxdvb_frontend.c
+++ b/src/input/mpegts/linuxdvb/linuxdvb_frontend.c
@@ -1417,7 +1417,8 @@ linuxdvb_frontend_tune0
 #endif
     }
 #if DVB_VER_ATLEAST(5,9)
-    S2CMD(DTV_LNA, lfe->lfe_lna ? 1 : 0);
+    if (lfe->lfe_lna)
+      S2CMD(DTV_LNA, 1);
 #endif
 
   /* DVB-C */