Fix reference 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 edade5fb947220c6d228fa0db149fd1ed2ce7391..c8d925b66fd970a08716e7b724b817237e997ca4 100644
--- a/fpdfsdk/src/jsapi/fxjs_v8.cpp
+++ b/fpdfsdk/src/jsapi/fxjs_v8.cpp
@@ -758,6 +758,10 @@ double _getLocalTZA()
 	time_t t = 0;
 	time(&t);
 	localtime(&t);
+#if _MSC_VER >= 1900  // VS 2015
+  long timezone = 0;
+  _get_timezone(&timezone);
+#endif
 	return (double)(-(timezone * 1000));

[Tom Sepez, 2015/04/08 22:51:19]

Is _get_timezone() defined on all of the VS versions we care about?  If so, can
we always use it, renaming |timezone| to avoid collisions?

Alternatively, I'd like to see a comment that timezone is a windows global,
since it looks undefined (and wrong) if the #if block isn't included.

 }