fix a bug with 'test -n' option

[tools/install.git] / config_files / graphviz-1.9.sh

diff --git a/config_files/graphviz-1.9.sh b/config_files/graphviz-1.9.sh
index b047817e79375857cd2897f6f34a2c1bec26dc3e..b28c4bcfc1da9da03db109c7622d8de6403e8022 100755 (executable)
--- a/config_files/graphviz-1.9.sh
+++ b/config_files/graphviz-1.9.sh
@@ -3,7 +3,7 @@
 check_version()
 {
 isdot=`which dot 2>/dev/null`
-if [ -n isdot ]; then
+if [ -n "$isdot" ]; then
   ver=`dot -V 2>&1 | awk '{print $3}'`
   if [ "$ver" == "1.9" ]; then
     return 0