More Hibernate 6.2 compatibility.

Change-Id: Ib06822de4e2d64419a8285c0a46b2d8931cea4c8
diff --git a/src/main/java/eu/mulk/mulkcms2/benki/posts/PostTextPK.java b/src/main/java/eu/mulk/mulkcms2/benki/posts/PostTextPK.java
index 74ad89e..6526526 100644
--- a/src/main/java/eu/mulk/mulkcms2/benki/posts/PostTextPK.java
+++ b/src/main/java/eu/mulk/mulkcms2/benki/posts/PostTextPK.java
@@ -9,17 +9,17 @@
 
   @Id
   @Column(name = "post", nullable = false)
-  private int postId;
+  private Integer postId;
 
   @Id
   @Column(name = "language", nullable = false, length = -1)
   private String language;
 
-  public int getPostId() {
+  public Integer getPostId() {
     return postId;
   }
 
-  public void setPostId(int postId) {
+  public void setPostId(Integer postId) {
     this.postId = postId;
   }