build,travis: git rev-list can also error and return nothing
authorEtienne Champetier <champetier.etienne@gmail.com>
Sun, 13 Aug 2017 22:37:18 +0000 (15:37 -0700)
committerEtienne Champetier <champetier.etienne@gmail.com>
Sun, 13 Aug 2017 22:38:46 +0000 (15:38 -0700)
commitdede62cf88b0c33281fb491723477bc1bbacc5e5
treead1e9cff490d9ff9f386c6f142d16ffaf9104b8f
parentbd4fd07f1bdc494b6a6ede7151f6e744ae2e0ef9
build,travis: git rev-list can also error and return nothing

"fatal: Invalid revision range XXX...YYY"

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>
.travis_do.sh