Bug 978188: Guard 'restartVerifier' member-var decl with the same #ifdef as its usage, to fix clang 'unused-private-field' warning. r=terrence

js/public/GCAPI.h

@@ -316,7 +316,7 @@ WasIncrementalGC(JSRuntime *rt);
 class JS_FRIEND_API(AutoDisableGenerationalGC)
 {
     JSRuntime *runtime;
-#ifdef JS_GC_ZEAL
+#if defined(JSGC_GENERATIONAL) && defined(JS_GC_ZEAL)
     bool restartVerifier;
 #endif
 

js/src/jsfriendapi.cpp

@@ -932,7 +932,7 @@ JS::DisableIncrementalGC(JSRuntime *rt)
 
 JS::AutoDisableGenerationalGC::AutoDisableGenerationalGC(JSRuntime *rt)
   : runtime(rt)
-#ifdef JS_GC_ZEAL
+#if defined(JSGC_GENERATIONAL) && defined(JS_GC_ZEAL)
   , restartVerifier(rt->gcVerifyPostData)
 #endif
 {