Re-enable MSVC warning 4800 for compiling with chromium_code

core/include/fxcrt/fx_ext.h

Index: core/include/fxcrt/fx_ext.h
diff --git a/core/include/fxcrt/fx_ext.h b/core/include/fxcrt/fx_ext.h
index 689d8e8fc4bd185d6cab5f5672ebe4d9107503db..a5bccb57b5171f3102fbe6da05149ca22a3a5f91 100644
--- a/core/include/fxcrt/fx_ext.h
+++ b/core/include/fxcrt/fx_ext.h
@@ -60,11 +60,11 @@ inline int FXSYS_toHexDigit(const FX_CHAR c) {
 }
 
 inline bool FXSYS_isDecimalDigit(const FX_CHAR c) {
-  return std::isdigit(c);
+  return std::isdigit(c) != 0;

[Tom Sepez, 2016/03/11 00:30:28]

nit: prefer !!std::isdigit(c) 
also below.

[Wei Li, 2016/03/11 04:11:36]

Done.

 }
 
 inline bool FXSYS_isDecimalDigit(const FX_WCHAR c) {
-  return std::iswdigit(c);
+  return std::iswdigit(c) != 0;
 }
 
 inline int FXSYS_toDecimalDigit(const FX_CHAR c) {