Remove redundant cast to short for MainForm.PreFutureFrameCallback

fixes 6223c9d

Author: YoshiRulz

src/BizHawk.Client.Common/EventTypes.cs

@@ -126,7 +126,7 @@ public StateSavedEventArgs(string stateName)
 	/// <summary>
 	/// Represent a method that will control future emulation.
 	/// </summary>
-	/// <param name="futureFramesEmulated">The number of frames into the future that have been emulated. This is a short purely to help avoid accidentally passing in absurdly large numbers.</param>
+	/// <param name="futureFramesEmulated">The number of frames into the future that have been emulated.</param>
 	/// <returns>True to display the current frame, false to continue emulating into the future.</returns>
-	public delegate bool ShowFutureCallback(short futureFramesEmulated);
+	public delegate bool ShowFutureCallback(int futureFramesEmulated);
 }

src/BizHawk.Client.EmuHawk/MainForm.cs

@@ -3081,7 +3081,7 @@ private void StepRunLoop_Core(bool force = false)
 					statable.SaveStateBinary(new(state));
 
 					int frameCount = 0;
-					while (!PreFutureFrameCallback((short)frameCount) && frameCount < MaxFutureFrames)
+					while (!PreFutureFrameCallback(frameCount) && frameCount < MaxFutureFrames)
 					{
 						frameCount++;
 						MovieSession.HandleFrameBefore();