Tvheadend

On some systems the --dirty switch of git-describe is not available, so the instruction on the support/version Bash script:

# Calculate version
if [ -d ".git" ]; then
   VER=$(cd $(dirname $0); git describe --dirty --match "v*" 2> /dev/null

fails because:

debian-x86:~/tvheadend/tvheadend# git-describe --dirty --match "v*"; echo $?
error: unknown option `dirty'
usage: git-describe [options] <committish>*

    --contains            find the tag that comes after the commit
    --debug               debug search strategy on stderr
    --all                 use any ref in .git/refs
    --tags                use any tag in .git/refs/tags
    --long                always use long format
    --abbrev[=<n>]        use <n> digits to display SHA-1s
    --exact-match         only output exact matches
    --candidates <n>      consider <n> most recent tags (default: 10)
    --match <pattern>     only consider tags matching <pattern>
    --always              show abbreviated commit object as fallback

129

debian-x86:~/tvheadend/tvheadend# git-describe --match "v*"; echo $?        
v3.3-183-g5d2197c
0

and the resulting version on TVHeadend Web UI is empty because:

debian-x86:~/tvheadend/tvheadend# cat src/version.c 
const char *tvheadend_version = "";

Please add error checking so that this specific case is provided.
Thanks.