Fix random segfault issue when loading chan_zap. Trying to access a configuration structure that has already been destroyed is bad, mmmk?

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@80023 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_zap.c

@@ -12733,7 +12733,7 @@ static int setup_zap(int reload)
 	if (ucfg) {
 		char *cat;
 		const char *chans;
-		process_zap(&base_conf, ast_variable_browse(cfg, "general"), 1, 1);
+		process_zap(&base_conf, ast_variable_browse(ucfg, "general"), 1, 1);
 		for (cat = ast_category_browse(ucfg, NULL); cat ; cat = ast_category_browse(ucfg, cat)) {
 			if (!strcasecmp(cat, "general"))
 				continue;