gba: disable outside interim

BizHawk.MultiClient/MainForm.cs

@@ -1830,6 +1830,8 @@ namespace BizHawk.MultiClient
 								nextEmulator = c64;
 								break;
 							case "GBA":
+								if (INTERIM)
+								{
 									string gbabiospath = Path.Combine(PathManager.MakeAbsolutePath(Global.Config.PathGBAFirmwares, "GBA"), "gbabios.rom");
 									byte[] gbabios = null;
 
@@ -1845,6 +1847,7 @@ namespace BizHawk.MultiClient
 									GBA gba = new GBA();
 									gba.Load(rom.RomData, gbabios);
 									nextEmulator = gba;
+								}
 								break;
 						}
 					}