Remove unused identifier from NotifyTouch

The 'state' parameter in GUIAction::NotifyTouch() is used in the
function.

Change-Id: I0744c7aa1542d771dbd2916638fbdd53e9681f86
diff --git a/gui/action.cpp b/gui/action.cpp
index b471aaf..7db1f87 100644
--- a/gui/action.cpp
+++ b/gui/action.cpp
@@ -284,7 +284,7 @@
 	}
 }
 
-int GUIAction::NotifyTouch(TOUCH_STATE state __unused, int x __unused, int y __unused)
+int GUIAction::NotifyTouch(TOUCH_STATE state, int x __unused, int y __unused)
 {
 	if (state == TOUCH_RELEASE)
 		doActions();