Fix pbx_builtin_setlanguage to not seg when data is a NULL ptr. Also fix AGI so we dont run into this with other specific problems as well. (bug 2641)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@3990 65c4cc65-6c06-0410-ace0-fbb531ad65f3

pbx.c

@@ -4483,6 +4483,7 @@ static int pbx_builtin_answer(struct ast_channel *chan, void *data)
 static int pbx_builtin_setlanguage(struct ast_channel *chan, void *data)
 {
 	/* Copy the language as specified */
+	if (data)
 		strncpy(chan->language, (char *)data, sizeof(chan->language)-1);
 	return 0;
 }

res/res_agi.c

@@ -827,7 +827,7 @@ static int handle_exec(struct ast_channel *chan, AGI *agi, int argc, char **argv
 	app = pbx_findapp(argv[1]);
 
 	if (app) {
-		res = pbx_exec(chan, app, argv[2], 1);
+		res = pbx_exec(chan, app, argv[2] ? argv[2] : NULL, 1);
 	} else {
 		ast_log(LOG_WARNING, "Could not find application (%s)\n", argv[1]);
 		res = -2;