mciqtz32: Fix thread handle leak if a second play.

dlls/mciqtz32/mciqtz.c

@@ -449,10 +449,13 @@ static DWORD MCIQTZ_mciPlay(UINT wDevID, DWORD dwFlags, LPMCI_PLAY_PARMS lpParms
 
     IVideoWindow_put_Visible(wma->vidwin, OATRUE);
 
-    wma->thread = CreateThread(NULL, 0, MCIQTZ_notifyThread, wma, 0, NULL);
-    if (!wma->thread) {
-        TRACE("Can't create thread\n");
-        return MCIERR_INTERNAL;
+    if (!wma->thread)
+    {
+        wma->thread = CreateThread(NULL, 0, MCIQTZ_notifyThread, wma, 0, NULL);
+        if (!wma->thread) {
+            TRACE("Can't create thread\n");
+            return MCIERR_INTERNAL;
+        }
     }
     return 0;
 }

dlls/winmm/tests/mci.c

@@ -1336,6 +1336,19 @@ static void test_playWaveTypeMpegvideo(void)
 
     err = mciSendStringA("close mysound", NULL, 0, NULL);
     ok(!err,"mci close returned %s\n", dbg_mcierr(err));
+
+    /* test a second play */
+    err = mciSendStringA("open tempfile.wav type MPEGVideo alias mysound", NULL, 0, NULL);
+    ok(err==ok_saved,"mci open tempfile.wav type MPEGVideo returned %s\n", dbg_mcierr(err));
+
+    err = mciSendStringA("play mysound", NULL, 0, NULL);
+    ok(!err,"mci play retuend %s\n", dbg_mcierr(err));
+
+    err = mciSendStringA("play mysound", NULL, 0, NULL);
+    ok(!err,"mci play retuend %s\n", dbg_mcierr(err));
+
+    err = mciSendStringA("close mysound", NULL, 0, NULL);
+    ok(!err,"mci close returned %s\n", dbg_mcierr(err));
 }
 
 static void test_asyncWaveTypeMpegvideo(HWND hwnd)