Replace a few more std::unique_ptr.reset() with WrapUnique assignments.

core/fxge/dib/fx_dib_engine.cpp

Index: core/fxge/dib/fx_dib_engine.cpp
diff --git a/core/fxge/dib/fx_dib_engine.cpp b/core/fxge/dib/fx_dib_engine.cpp
index 7ba031e8aafd28a0a83a2d27f4bd8bfdf1dd8962..e8401d7663c6a15047b5e1e96ce0672072657e14 100644
--- a/core/fxge/dib/fx_dib_engine.cpp
+++ b/core/fxge/dib/fx_dib_engine.cpp
@@ -930,9 +930,9 @@ FX_BOOL CFX_ImageStretcher::Continue(IFX_Pause* pPause) {
 }
 
 FX_BOOL CFX_ImageStretcher::StartStretch() {
-  m_pStretchEngine.reset(new CStretchEngine(m_pDest, m_DestFormat, m_DestWidth,
-                                            m_DestHeight, m_ClipRect, m_pSource,
-                                            m_Flags));
+  m_pStretchEngine = WrapUnique(
+      new CStretchEngine(m_pDest, m_DestFormat, m_DestWidth, m_DestHeight,
+                         m_ClipRect, m_pSource, m_Flags));
   m_pStretchEngine->StartStretchHorz();
   if (SourceSizeWithinLimit(m_pSource->GetWidth(), m_pSource->GetHeight())) {
     m_pStretchEngine->Continue(nullptr);