Insert a fixed Shuttle 386SX. Fixes compile errors.

src/machine/m_at_286_386sx.c

@@ -420,6 +420,27 @@ machine_at_deskmaster286_init(const machine_t *model)
     return ret;
 }
 
+int
+machine_at_shuttle386sx_init(const machine_t *model)
+{
+    int ret;
+
+    ret = bios_load_interleaved(L"roms/machines/shuttle386sx/386-Shuttle386SX-Even.BIN",
+				L"roms/machines/shuttle386sx/386-Shuttle386SX-Odd.BIN",
+			   0x000f0000, 131072, 0);
+
+    if (bios_only || !ret)
+	return ret;
+
+    machine_at_common_init(model);
+
+    device_add(&i82335_device);
+    device_add(&keyboard_at_ami_device);
+    device_add(&fdc_at_device);
+
+    return ret;
+}
+
 int
 machine_at_wd76c10_init(const machine_t *model)
 {