Test for existance of path file was broken, used the wrong test.

Author: miracle2k

virtualenvwrapper_bashrc

@@ -379,7 +379,7 @@ function add2virtualenv () {
         shift
     fi
 
-    if [ ! -x "$path_file" ]
+    if [ ! -f "$path_file" ]
     then
         echo "import sys; sys.__plen = len(sys.path)" >> "$path_file"
         echo "import sys; new=sys.path[sys.__plen:]; del sys.path[sys.__plen:]; p=getattr(sys,'__egginsert',0); sys.path[p:p]=new; sys.__egginsert = p+len(new)" >> "$path_file"