Fixed case where alternate deactivate didn't exist

Author: truthdoug

virtualenvwrapper.sh

@@ -751,11 +751,15 @@ function workon {
     # before switching so we use our override function,
     # if it exists, but make sure it's the deactivate function
     # we set up
-    type deactivate | grep 'typeset env_postdeactivate_hook' >/dev/null 2>&1
+    type deactivate >/dev/null 2>&1
     if [ $? -eq 0 ]
     then
-        deactivate
-        unset -f deactivate >/dev/null 2>&1
+        type deactivate | grep 'typeset env_postdeactivate_hook' >/dev/null 2>&1
+        if [ $? -eq 0 ]
+        then
+            deactivate
+            unset -f deactivate >/dev/null 2>&1
+        fi
     fi
 
     virtualenvwrapper_run_hook "pre_activate" "$env_name"