Fix errors when commands return error text rather than data

I'm looking at you euca2ools Change-Id: I82bfb8a3ee58fdc54ead6a285c9415593e741892
2012-11-02 16:59:03 -05:00 · 2012-11-02 16:59:03 -05:00 · e88c0a2036
commit e88c0a2036
parent afaeefd183
1 changed files with 1 additions and 1 deletions
--- a/2
+++ b/2
@ -570,7 +570,7 @@ function is_package_installed() {
 # is_set env-var
 function is_set() {
    local var=\$"$1"
-    if eval "[ -z $var ]"; then
+    if eval "[ -z \"$var\" ]"; then
        return 1
    fi
    return 0