Merge pull request #694 from edubxb/fix-fasd-linux

Make #691 work on Linux

plugins/available/fasd.plugin.bash

@@ -2,7 +2,7 @@ cite about-plugin
 about-plugin 'initialize fasd (see https://github.com/clvv/fasd)'
 
 __init_fasd() {
-  which -s fasd
+  which fasd &> /dev/null
   if [ $? -eq 1 ]; then
     echo -e "You must install fasd before you can use this plugin"
     echo -e "See: https://github.com/clvv/fasd"