cleanup: avoid an -o '' empty-string option

diff --git a/src/PVE/LXC.pm b/src/PVE/LXC.pm
index d4645c243418606442adaf067dd8f74c3187e490..3ed5d92fd5ecaf4acc44a32c8cd2ee1905dcaf7f 100644 (file)
--- a/src/PVE/LXC.pm
+++ b/src/PVE/LXC.pm
@@ -1044,7 +1044,7 @@ sub mountpoint_mount {
     }
     my $readonly = $mountpoint->{ro};
 
-    my @extra_opts = ('-o', $optstring);
+    my @extra_opts = ('-o', $optstring) if $optstring;
 
     if ($storage) {