added missing '{'

etc/ser-oob.cfg

@@ -1084,7 +1084,7 @@ route[SESSION_TIMER]
 		eval_oper(">", -2);
 
 		# lets check for the Suported header
-		if (hf_value_exists("Supported", "timer"))
+		if (hf_value_exists("Supported", "timer")) {
 			# the UAC supports Session Timer, so we
 			# only need to take a look at the values