build fix for 16957 - broke shared builds

TBR=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/24562009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16962 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

include/v8.h

@@ -5420,7 +5420,7 @@ class Internals {
   static const int kUndefinedOddballKind = 5;
   static const int kNullOddballKind = 3;
 
-  static void CheckInitializedImpl(v8::Isolate* isolate);
+  V8_EXPORT static void CheckInitializedImpl(v8::Isolate* isolate);
   V8_INLINE static void CheckInitialized(v8::Isolate* isolate) {
 #ifdef V8_ENABLE_CHECKS
     CheckInitializedImpl(isolate);