Only consider xen-[0-9]* as candidates either for returning, or for
matching the current branch.

The effect is that attempts to ask for the `previous Xen branch' of
anything other than a Xen stable branch give the latest Xen stable
branch, which I think is correct.

This fixes a bug where the `previous branch' of xen-unstable-smoke was
considered to be xen-unstable-coverity (!)

This bug would not have been of any consequence, except that the
coverity tested branch name in xen.bit changed in
c/s d94637b6 "coverity: run tests on smoked rather than master"
and had not been created, so that cr-daily-branch would crash for
most branches because the (largely irrelevant) invocation of
`./ap-fetch-version-old xen-unstable-coverity' would fail.

Signed-off-by: Ian Jackson <ian.jack...@eu.citrix.com>
---
 cri-getprevxenbranch |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cri-getprevxenbranch b/cri-getprevxenbranch
index a70138e..c4e3ee5 100755
--- a/cri-getprevxenbranch
+++ b/cri-getprevxenbranch
@@ -7,7 +7,7 @@ p=
 
 for b in $(./mg-list-all-branches) ; do # already sorted by version
     case "$b" in
-       xen*)
+       xen-[0-9]*)
            if [ "x$b" = "x$xenbranch" ] ; then
                break
            else
-- 
1.7.10.4


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