chan_ooh323: fix rtptimeout general value checking

correct condition to check rtptimeout in [general] config section

ASTERISK-24393 #close
Reported by:  Dmitry Melekhov
Tested by:  Dmitry Melekhov
Patches:
  ASTERISK-24393.patch
........

Merged revisions 425547 from http://svn.asterisk.org/svn/asterisk/branches/1.8


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/11@425548 65c4cc65-6c06-0410-ace0-fbb531ad65f3

addons/chan_ooh323.c

@@ -2968,7 +2968,7 @@ int reload_config(int reload)
 			gNat = ast_true(v->value);
 		} else if (!strcasecmp(v->name, "rtptimeout")) {
 			gRTPTimeout = atoi(v->value);
-			if (gRTPTimeout <= 0)
+			if (gRTPTimeout < 0)
 				gRTPTimeout = 60;
 		} else if (!strcasecmp(v->name, "tos")) {
 			if (sscanf(v->value, "%30i", &format) == 1)