mmdevapi/tests: Fix memory leaks (Coverity).

dlls/mmdevapi/tests/capture.c

@@ -556,8 +556,7 @@ static void test_audioclient(void)
     if (hr != S_OK)
     {
         skip("Cannot initialize %08x, remainder of tests is useless\n", hr);
-        CoTaskMemFree(pwfx);
-        return;
+        goto cleanup;
     }
 
     hr = IAudioClient_GetStreamLatency(ac, NULL);
@@ -592,6 +591,7 @@ static void test_audioclient(void)
 
     test_capture(ac, handle, pwfx);
 
+cleanup:
     IAudioClient_Release(ac);
     CloseHandle(handle);
     CoTaskMemFree(pwfx);

dlls/mmdevapi/tests/render.c

@@ -323,11 +323,7 @@ static void test_audioclient(void)
     hr = IAudioClient_Initialize(ac, AUDCLNT_SHAREMODE_SHARED, 0, 5000000, 0, pwfx, NULL);
     ok(hr == S_OK, "Valid Initialize returns %08x\n", hr);
     if (hr != S_OK)
-    {
-        IAudioClient_Release(ac);
-        CoTaskMemFree(pwfx);
-        return;
-    }
+        goto cleanup;
 
     hr = IAudioClient_GetStreamLatency(ac, NULL);
     ok(hr == E_POINTER, "GetStreamLatency(NULL) call returns %08x\n", hr);
@@ -372,8 +368,8 @@ static void test_audioclient(void)
     hr = IAudioClient_Start(ac);
     ok(hr == AUDCLNT_E_NOT_STOPPED, "Start twice returns %08x\n", hr);
 
+cleanup:
     IAudioClient_Release(ac);
-
     CloseHandle(handle);
     CoTaskMemFree(pwfx);
 }