ClutterInputDevice: Store the cursor coordinate state as floating point

To support sub-pixel motion events coming from relative events, the
fraction part needs to be stored in the input device state as well. To
do this, simply change the current type from gint to gfloat.

https://bugzilla.gnome.org/show_bug.cgi?id=736413

clutter/clutter-input-device.c

@@ -417,8 +417,8 @@ _clutter_input_device_ensure_touch_info (ClutterInputDevice *device,
 void
 _clutter_input_device_set_coords (ClutterInputDevice   *device,
                                   ClutterEventSequence *sequence,
-                                  gint                  x,
-                                  gint                  y,
+                                  gfloat                x,
+                                  gfloat                y,
                                   ClutterStage         *stage)
 {
   g_return_if_fail (CLUTTER_IS_INPUT_DEVICE (device));