quartz/tests: Fix some media type leaks (Valgrind).

dlls/quartz/tests/avidec.c

@@ -1525,6 +1525,8 @@ static void test_connect_pin(void)
     ok(testsource.source.pin.peer == sink, "Got peer %p.\n", testsource.source.pin.peer);
     IFilterGraph2_Disconnect(graph, &testsource.source.pin.IPin_iface);
 
+    FreeMediaType(&source_mt);
+    FreeMediaType(&req_mt);
     IMemInputPin_Release(meminput);
     IPin_Release(sink);
     IPin_Release(source);

dlls/quartz/tests/avisplit.c

@@ -1233,6 +1233,7 @@ static void test_connect_pin(void)
     ok(hr == S_OK, "Got hr %#lx.\n", hr);
     ok(compare_media_types(&mt, &req_mt), "Media types didn't match.\n");
     ok(compare_media_types(&testsource.source.pin.mt, &req_mt), "Media types didn't match.\n");
+    FreeMediaType(&mt);
 
     hr = IMediaControl_Pause(control);
     ok(hr == S_OK, "Got hr %#lx.\n", hr);
@@ -1281,6 +1282,7 @@ static void test_connect_pin(void)
     ok(hr == S_OK, "Got hr %#lx.\n", hr);
     ok(compare_media_types(&mt, &req_mt), "Media types didn't match.\n");
     ok(compare_media_types(&testsink.sink.pin.mt, &req_mt), "Media types didn't match.\n");
+    FreeMediaType(&mt);
 
     hr = IMediaControl_Pause(control);
     ok(hr == S_OK, "Got hr %#lx.\n", hr);