Fix for preventing git error message in cron logs

Fix to prevent "fatal: No names found, cannot describe anything" git message during scheduled update checks

Signed-off-by: DL6ER <dl6er@dl6er.de>

advanced/Scripts/updatecheck.sh

@@ -34,7 +34,7 @@ function get_local_branch() {
 function get_local_version() {
     # Return active branch
     cd "${1}" 2> /dev/null || return 1
-    git describe --long --dirty --tags || return 1
+    git describe --long --dirty --tags 2> /dev/null || return 1
 }
 
 # Source the setupvars config file