(svn r25985) [1.3] -Backport from trunk:

- Fix: Lower sprite and text at the vehicle bar if it is pressed [FS#5739] (r25804)
- Fix: Draw start/stop graphics of the vehicle bar at the right place in RTL mode [FS#5738] (r25803)
- Fix: [Script] Decoding JSON data with an empty array from Admin port failed (r25809)
- Fix: [NewGRF] Do not allow changing palette when it's set by the NewGRF (r25794, r25793, r25972)

src/script/api/script_event_types.cpp

@@ -244,6 +244,14 @@ char *ScriptEventAdminPort::ReadValue(HSQUIRRELVM vm, char *p)
 			/* Array */
 			sq_newarray(vm, 0);
 
+			/* Empty array? */
+			char *p2 = p+1;
+			SKIP_EMPTY(p2);
+			if (*p2 == ']') {
+				p = p2+1;
+				break;
+			}
+
 			while (*p++ != ']') {
 				p = this->ReadValue(vm, p);
 				if (p == NULL) {