windowscodecs: Fix incorrect overflow check caused by test mistake.

dlls/windowscodecs/stream.c

@@ -129,13 +129,12 @@ static HRESULT WINAPI StreamOnMemory_Seek(IStream *iface,
     LARGE_INTEGER NewPosition;
     TRACE("(%p)\n", This);
 
-    if (dlibMove.QuadPart > 0xFFFFFFFF) return HRESULT_FROM_WIN32(ERROR_ARITHMETIC_OVERFLOW);
-
     if (dwOrigin == STREAM_SEEK_SET) NewPosition.QuadPart = dlibMove.QuadPart;
     else if (dwOrigin == STREAM_SEEK_CUR) NewPosition.QuadPart = This->dwCurPos + dlibMove.QuadPart;
     else if (dwOrigin == STREAM_SEEK_END) NewPosition.QuadPart = This->dwMemsize + dlibMove.QuadPart;
     else return E_INVALIDARG;
 
+    if (NewPosition.u.HighPart) return HRESULT_FROM_WIN32(ERROR_ARITHMETIC_OVERFLOW);
     if (NewPosition.QuadPart > This->dwMemsize) return E_INVALIDARG;
     if (NewPosition.QuadPart < 0) return E_INVALIDARG;
     This->dwCurPos = NewPosition.u.LowPart;

dlls/windowscodecs/tests/stream.c

@@ -107,9 +107,10 @@ static void test_StreamOnMemory(void)
     ok(uNewPos.u.HighPart == 0 && uNewPos.u.LowPart == sizeof(Memory) - 1, "bSeek cursor moved to position (%u;%u)\n", uNewPos.u.HighPart, uNewPos.u.LowPart);
 
     IWICStream_Seek(pStream, LargeNull, STREAM_SEEK_SET, &uNewPos); /* reset seek pointer */
-    LargeInt.QuadPart = -sizeof(Memory) - 5;
+    LargeInt.QuadPart = -(LONGLONG)sizeof(Memory) - 5;
     hr = IWICStream_Seek(pStream, LargeInt, STREAM_SEEK_END, &uNewPos);
-    ok(hr == E_INVALIDARG, "Seek returned with %#x, expected %#x\n", hr, E_INVALIDARG);
+    ok(hr == HRESULT_FROM_WIN32(ERROR_ARITHMETIC_OVERFLOW),
+       "Seek returned with %#x, expected %#x\n", hr, HRESULT_FROM_WIN32(ERROR_ARITHMETIC_OVERFLOW));
     ok(uNewPos.u.HighPart == 0 && uNewPos.u.LowPart == 0, "bSeek cursor moved to position (%u;%u), expected (%u;%u)\n", uNewPos.u.HighPart, uNewPos.u.LowPart, 0, 0); /* remains unchanged */
     IWICStream_Seek(pStream, LargeNull, STREAM_SEEK_SET, NULL);