Add missing WaitDialog::clear() (Fixes #4196)

apps/openmw/mwgui/waitdialog.cpp

@@ -96,6 +96,12 @@ namespace MWGui
         return (!mTimeAdvancer.isRunning()); //Only exit if not currently waiting
     }
 
+    void WaitDialog::clear()
+    {
+        mSleeping = false;
+        mTimeAdvancer.stop();
+    }
+
     void WaitDialog::onOpen()
     {
         if (mTimeAdvancer.isRunning())

apps/openmw/mwgui/waitdialog.hpp

@@ -33,6 +33,8 @@ namespace MWGui
 
         virtual bool exit();
 
+        virtual void clear();
+
         void onFrame(float dt);
 
         bool getSleeping() { return mTimeAdvancer.isRunning() && mSleeping; }