chan_dahdi: Don't ignore setvar when using configuration section scheme.

When the configuration section scheme of chan_dahdi.conf is used (keyword
dahdichan instead of channel) all setvar= options are completely ignored.
No variable defined this way appears in the created DAHDI channels.

* Move the clearing of setvar values to after the deferred processing of
dahdichan.

AST-1378 #close
Reported by: Guenther Kelleter
Patch by: Guenther Kelleter
........

Merged revisions 429825 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: https://origsvn.digium.com/svn/asterisk/certified/branches/11.6@429831 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_dahdi.c

@@ -18577,12 +18577,6 @@ static int process_dahdi(struct dahdi_chan_conf *confp, const char *cat, struct
 			ast_log(LOG_WARNING, "Ignoring any changes to '%s' (on reload) at line %d.\n", v->name, v->lineno);
 	}
-	/* Since confp has already filled invidual dahdi_pvt objects with channels at this point, clear the variables in confp's pvt. */
-	if (confp->chan.vars) {
-		ast_variables_destroy(confp->chan.vars);
-		confp->chan.vars = NULL;
-	}
-
 	if (dahdichan) {
 		/* Process the deferred dahdichan value. */
 		if (build_channels(confp, dahdichan->value, reload, dahdichan->lineno,
@@ -18597,6 +18591,15 @@ static int process_dahdi(struct dahdi_chan_conf *confp, const char *cat, struct
 		}
 	}
+	/*
+	 * Since confp has already filled individual dahdi_pvt objects with channels
+	 * at this point, clear the variables in confp's pvt.
+	 */
+	if (confp->chan.vars) {
+		ast_variables_destroy(confp->chan.vars);
+		confp->chan.vars = NULL;
+	}
+
 	/* mark the first channels of each DAHDI span to watch for their span alarms */
 	for (tmp = iflist, y=-1; tmp; tmp = tmp->next) {
 		if (!tmp->destroy && tmp->span != y) {