sesman: avoid creation of .vnc directory if not vnc session

sesman/session.c

@@ -460,6 +460,7 @@ session_start_fork(int width, int height, int bpp, char *username,
     char screen[32];
     char text[256];
     char passwd_file[256];
+    char *pfile;
     char **pp1 = (char **)NULL;
     struct session_chain *temp = (struct session_chain *)NULL;
     struct list *xserver_params = (struct list *)NULL;
@@ -633,7 +634,12 @@ session_start_fork(int width, int height, int bpp, char *username,
             }
             else if (xpid == 0) /* child */
             {
-                env_set_user(username, passwd_file, display,
+                pfile = 0;
+                if (type == SESMAN_SESSION_TYPE_XVNC)
+                {
+                    pfile = passwd_file;
+                }
+                env_set_user(username, pfile, display,
                              g_cfg->session_variables1,
                              g_cfg->session_variables2);