fpi-image-device: Reorder image state not to change values

We need this to avoid breaking already present TOD image devices
drivers.

libfprint/drivers/virtual-image.c

@@ -208,8 +208,12 @@ recv_image (FpDeviceVirtualImage *self, GInputStream *stream)
   g_debug ("Starting image receive (if active), state is: %i", state);
 
   /* Only register if the state is active. */
-  if (state >= FPI_IMAGE_DEVICE_STATE_IDLE)
+  switch (state)
     {
+    case FPI_IMAGE_DEVICE_STATE_IDLE:
+    case FPI_IMAGE_DEVICE_STATE_AWAIT_FINGER_ON:
+    case FPI_IMAGE_DEVICE_STATE_CAPTURE:
+    case FPI_IMAGE_DEVICE_STATE_AWAIT_FINGER_OFF:
       g_input_stream_read_all_async (stream,
                                      self->recv_img_hdr,
                                      sizeof (self->recv_img_hdr),
@@ -217,6 +221,10 @@ recv_image (FpDeviceVirtualImage *self, GInputStream *stream)
                                      self->cancellable,
                                      recv_image_hdr_recv_cb,
                                      self);
+    /* fallthrough */
+
+    default:
+      break;
     }
 }
 

libfprint/fpi-image-device.h

@@ -62,12 +62,12 @@
  */
 typedef enum {
   FPI_IMAGE_DEVICE_STATE_INACTIVE,
-  FPI_IMAGE_DEVICE_STATE_ACTIVATING,
-  FPI_IMAGE_DEVICE_STATE_DEACTIVATING,
-  FPI_IMAGE_DEVICE_STATE_IDLE,
   FPI_IMAGE_DEVICE_STATE_AWAIT_FINGER_ON,
   FPI_IMAGE_DEVICE_STATE_CAPTURE,
   FPI_IMAGE_DEVICE_STATE_AWAIT_FINGER_OFF,
+  FPI_IMAGE_DEVICE_STATE_ACTIVATING,
+  FPI_IMAGE_DEVICE_STATE_DEACTIVATING,
+  FPI_IMAGE_DEVICE_STATE_IDLE,
 } FpiImageDeviceState;
 
 /**