Enable init'ed but unused var warning on windows for closer parity with mac/linux warnings.

src/ports/SkFontHost_win.cpp

 
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkAdvancedTypefaceMetrics.h"
 #include "SkBase64.h"
@@ skipping 408 matching lines @@
         fDC = CreateCompatibleDC(0);
         if (0 == fDC) {
             return NULL;
         }
         SetGraphicsMode(fDC, GM_ADVANCED);
         SetBkMode(fDC, TRANSPARENT);
         SetTextAlign(fDC, TA_LEFT | TA_BASELINE);
         SelectObject(fDC, fFont);
 
         COLORREF color = 0x00FFFFFF;
-        COLORREF prev = SetTextColor(fDC, color);
+        SkDEBUGCODE(COLORREF prev =) SetTextColor(fDC, color);
         SkASSERT(prev != CLR_INVALID);
     }
 
     if (fBM && (fIsBW != isBW || fWidth < glyph.fWidth || fHeight < glyph.fHeight)) {
         DeleteObject(fBM);
         fBM = 0;
     }
     fIsBW = isBW;
 
     fWidth = SkMax32(fWidth, glyph.fWidth);
@@ skipping 1251 matching lines @@
     if (isLCD(*rec) && !isAxisAligned(*rec)) {
         rec->fMaskFormat = SkMask::kA8_Format;
     }
 #endif
 
     if (!fCanBeLCD && isLCD(*rec)) {
         rec->fMaskFormat = SkMask::kA8_Format;
         rec->fFlags &= ~SkScalerContext::kGenA8FromLCD_Flag;
     }
 }