b2b_entities: fix crash if DB loaded entity hash_index is too large

(cherry picked from commit 2617ca4)

modules/b2b_entities/b2be_db.c

@@ -491,6 +491,12 @@ int b2b_entities_restore(void)
 					LM_ERR("Wrong format for b2b key [%.*s]\n", dlg.tag[1].len, dlg.tag[1].s);
 					goto error;
 				}
+
+				if (hash_index >= server_hsize) {
+					LM_ERR("Hash Index [%d] too large! Increase the 'server_hsize'"
+						"parameter!\n", hash_index);
+					goto error;
+				}
 			}
 			else
 			{
@@ -501,6 +507,12 @@ int b2b_entities_restore(void)
 					LM_ERR("Wrong format for b2b key [%.*s]\n", dlg.callid.len, dlg.callid.s);
 					goto error;
 				}
+
+				if (hash_index >= client_hsize) {
+					LM_DBG("Hash Index [%d] too large! Increase the 'client_hsize'"
+						"parameter!\n", hash_index);
+					goto error;
+				}
 			}
 			dlg.id               = local_index;
 			dlg.state            = row_vals[13].val.int_val;