Check to make sure opendir works in chan_iax2.c (bug 1283)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@2539 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_iax2.c

@@ -1051,6 +1051,7 @@ static void reload_firmware(void)
 	/* Now that we've freed them, load the new ones */
 	snprintf(dir, sizeof(dir), "%s/firmware/iax", (char *)ast_config_AST_VAR_DIR);
 	fwd = opendir(dir);
+	if (fwd) {
 		while((de = readdir(fwd))) {
 			if (de->d_name[0] != '.') {
 				snprintf(fn, sizeof(fn), "%s/%s", dir, de->d_name);
@@ -1061,6 +1062,8 @@ static void reload_firmware(void)
 			}
 		}
 		closedir(fwd);
+	} else 
+		ast_log(LOG_WARNING, "Error opening firmware directory '%s': %s\n", dir, strerror(errno));
 
 	/* Clean up leftovers */
 	cur = waresl.wares;