Quote strings to be empty tested

diff --git a/id-deb-build/id-pbuild.sh b/id-deb-build/id-pbuild.sh
index 50c06ef..8e131a6 100755 (executable)
--- a/id-deb-build/id-pbuild.sh
+++ b/id-deb-build/id-pbuild.sh
@@ -58,7 +58,7 @@ while test $# -gt 0; do
     shift
 done
 
-if test -n $DEBIAN_DIST_A -o -n $UBUNTU_DIST_A -o -n $CENTOS_DIST_A; then
+if test "$DEBIAN_DIST_A" -o "$UBUNTU_DIST_A" -o "$CENTOS_DIST_A"; then
     DEBIAN_DIST=$DEBIAN_DIST_A
     UBUNTU_DIST=$UBUNTU_DIST_A
     CENTOS_DIST=$CENTOS_DIST_A