Fix migration scripts

.travis.yml

@@ -5,6 +5,7 @@ node_js:
 
 env:
   - CXX=g++-4.9
+  - CC=gcc-4.9
 
 addons:
   apt:

server/initializers/constants.ts

@@ -9,7 +9,7 @@ import { isTestInstance, root } from '../helpers/core-utils'
 
 // ---------------------------------------------------------------------------
 
-const LAST_MIGRATION_VERSION = 130
+const LAST_MIGRATION_VERSION = 135
 
 // ---------------------------------------------------------------------------
 

server/initializers/migrations/0135-video-channel-actor.ts

@@ -10,6 +10,7 @@ async function up (utils: {
   // Create actor table
   {
     const queries = [
+      `DROP TYPE IF EXISTS enum_actor_type`,
       `
       CREATE TYPE enum_actor_type AS ENUM (
         'Group',