Make tests of tempdir var more explicit

I'm pretty sure I've seen at least one implementation of sh(1) upset
about [ "$var" ] over [ -n "$var" ]

1 files changed, 1 insertions, 1 deletions

diff --git a/bin/try b/bin/try
index f0cfddf5..f0ba317d 100755
--- a/bin/try
+++ b/bin/try
@@ -29,7 +29,7 @@ fi
 # Create a buffer file for the error output, and clean up the file when we exit
 td=
 cleanup() {
-    [ "$td" ] && rm -fr -- "$td"
+    [ -n "$td" ] && rm -fr -- "$td"
     if [ "$1" != EXIT ] ; then
         trap - "$1"
         kill "-$1" "$$"