common.sh: unset COLOR variables in a way that is `set -u` safe.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/common.sh b/lib/common.sh
index d1d958e..7c0a9d3 100644
--- a/lib/common.sh
+++ b/lib/common.sh
@@ -2,7 +2,7 @@
 export LANG=C
 
 # check if messages are to be printed using color
-unset ALL_OFF BOLD BLUE GREEN RED YELLOW
+declare ALL_OFF= BOLD= BLUE= GREEN= RED= YELLOW=
 if [[ -t 2 ]]; then
 	# prefer terminal safe colored and bold text when tput is supported
 	if tput setaf 0 &>/dev/null; then