svn: don't print exceptions in case of safe calls

vcsserver/svn.py

@@ -498,15 +498,15 b' class SvnRemote(RemoteBase):'
 
             return ''.join(p), ''.join(p.error)
         except (EnvironmentError, OSError) as err:
+            if safe_call:
+                return '', err
+            else:
             cmd = ' '.join(cmd)  # human friendly CMD
             tb_err = ("Couldn't run svn command (%s).\n"
                       "Original error was:%s\n"
                       "Call options:%s\n"
                       % (cmd, err, _opts))
             log.exception(tb_err)
-            if safe_call:
-                return '', err
-            else:
                 raise exceptions.VcsException()(tb_err)
 
     @reraise_safe_exceptions