Small fixes to SAPI5 (#17622)

Some small fixes to the SAPI5 code part that I wrote. Those things didn't cause crashes or obvious errors, so they slipped by.

Description of user facing changes
None

Description of development approach
plibNewPosition is a pointer, so writing to plibNewPosition->QuadPart should be plibNewPosition[0].QuadPart in Python. This is now corrected.

synth.player.idle() is moved to before the "trigger all untriggered bookmarks" part, to let the audio and the contained bookmarks finish first.

source/synthDrivers/sapi5.py

@@ -120,7 +120,7 @@ def IStream_RemoteSeek(
 		if dwOrigin == 1 and dlibMove.QuadPart == 0:
 			# SAPI is querying the current position.
 			if plibNewPosition:
-				plibNewPosition.QuadPart = self._writtenBytes
+				plibNewPosition[0].QuadPart = self._writtenBytes
 			return hresult.S_OK
 		return hresult.E_NOTIMPL
 
@@ -194,13 +194,13 @@ def Bookmark(self, streamNum: int, pos: int, bookmark: str, bookmarkId: int):
 
 	def EndStream(self, streamNum: int, pos: int):
 		synth = self.synthRef()
+		synth.player.idle()
 		# trigger all untriggered bookmarks
 		if streamNum in synth._streamBookmarks:
 			for bookmark in synth._streamBookmarks[streamNum]:
 				synthIndexReached.notify(synth=synth, index=bookmark)
 			del synth._streamBookmarks[streamNum]
 		synth.isSpeaking = False
-		synth.player.idle()
 		synthDoneSpeaking.notify(synth=synth)
 
 	def onIndexReached(self, streamNum: int, index: int):