[PATCH] Fix a bug introduced in r1071025.

[Noorul Islam K M]

Without the patch I get Segmentation fault when I pass unknown command
to svnadmin command.

Log

[[[
Fix a bug introduced in r1071025.

* subversion/svnadmin/main.c
  (parse_args): Handle NULL argument.

Patch by: Noorul Islam K M <noorul{_AT_}collab.net>
]]]


Index: subversion/svnadmin/main.c
===================================================================
--- subversion/svnadmin/main.c  (revision 1072234)
+++ subversion/svnadmin/main.c  (working copy)
@@ -549,7 +549,7 @@
            int max_expected,
            apr_pool_t *pool)
 {
-  int num_args = os->argc - os->ind;
+  int num_args = os ? (os->argc - os->ind) : 0;
 
   if (min_expected || max_expected)
     SVN_ERR_ASSERT(args);