Merge to XFA: Fix ref to timezone variable - removed in VS 2015

fpdfsdk/src/jsapi/fxjs_v8.cpp

Index: fpdfsdk/src/jsapi/fxjs_v8.cpp
diff --git a/fpdfsdk/src/jsapi/fxjs_v8.cpp b/fpdfsdk/src/jsapi/fxjs_v8.cpp
index 72966e9c6376f4011f6a9723eeea987e416b5807..2b77766b7a9e82bcaed9c00db71d1c0780051a70 100644
--- a/fpdfsdk/src/jsapi/fxjs_v8.cpp
+++ b/fpdfsdk/src/jsapi/fxjs_v8.cpp
@@ -761,6 +761,13 @@ double _getLocalTZA()
 	time_t t = 0;
 	time(&t);
 	localtime(&t);
+#if _MSC_VER >= 1900
+  // In gcc and in Visual Studio prior to VS 2015 'timezone' is a global
+  // variable declared in time.h. That variable was deprecated and in VS 2015
+  // is removed, with _get_timezone replacing it.
+  long timezone = 0;
+  _get_timezone(&timezone);
+#endif
 	return (double)(-(timezone * 1000));
 }