Re-enable several MSVC warnings

core/fxge/ge/fx_ge_text.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "core/fxge/ge/fx_text_int.h"
 #include "core/include/fxcodec/fx_codec.h"
 #include "core/include/fxge/fx_freetype.h"
 #include "core/include/fxge/fx_ge.h"
@@ skipping 357 matching lines @@
   } else {
     bitmap.Clear(0);
     if (bitmap.m_pAlphaMask) {
       bitmap.m_pAlphaMask->Clear(0);
     }
   }
   int dest_width = pixel_width;
   uint8_t* dest_buf = bitmap.GetBuffer();
   int dest_pitch = bitmap.GetPitch();
   int Bpp = bitmap.GetBPP() / 8;
-  int a, r, g, b;
+  int a = 0;
+  int r = 0;
+  int g = 0;
+  int b = 0;
   if (anti_alias == FXFT_RENDER_MODE_LCD) {
     _Color2Argb(fill_color, fill_color, alpha_flag | (1 << 24), pIccTransform);
     ArgbDecode(fill_color, a, r, g, b);
     r = FX_GAMMA(r);
     g = FX_GAMMA(g);
     b = FX_GAMMA(b);
   }
   for (iChar = 0; iChar < nChars; iChar++) {
     FXTEXT_GLYPHPOS& glyph = pGlyphAndPos[iChar];
     if (!glyph.m_pGlyph) {
@@ skipping 1474 matching lines @@
 void _CFX_UniqueKeyGen::Generate(int count, ...) {
   va_list argList;
   va_start(argList, count);
   for (int i = 0; i < count; i++) {
     int p = va_arg(argList, int);
     ((FX_DWORD*)m_Key)[i] = p;
   }
   va_end(argList);
   m_KeyLen = count * sizeof(FX_DWORD);
 }