Unlock the minivmlock when no configuration is found. (issue #9814 reported by eliel)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@66225 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_minivm.c

@@ -2515,6 +2515,7 @@ static int load_config(void)
 	/* Make sure we could load configuration file */
 	if (!cfg) {
 		ast_log(LOG_WARNING, "Failed to load configuration file. Module activated with default settings.\n");
+		ast_mutex_unlock(&minivmlock);
 		return 0;
 	}