jdk/src/java.desktop/windows/native/libawt/windows/awt_List.cpp

@@ -822,11 +822,11 @@
 {
     TRY;
 
     jobject selfGlobalRef = env->NewGlobalRef(self);
 
-    return (jint)AwtToolkit::GetInstance().SyncCall(
+    return (jint)(uintptr_t)AwtToolkit::GetInstance().SyncCall(
         (void *(*)(void *))AwtList::_GetMaxWidth,
         (void *)selfGlobalRef);
     // selfGlobalRef is deleted in _GetMaxWidth
 
     CATCH_BAD_ALLOC_RET(0);

@@ -1016,12 +1016,12 @@
 
     SelectElementStruct *ses = new SelectElementStruct;
     ses->list = env->NewGlobalRef(self);
     ses->index = index;
 
-    return (jboolean)AwtToolkit::GetInstance().SyncCall(
-        (void *(*)(void *))AwtList::_IsSelected, ses);
+    return (jboolean)(AwtToolkit::GetInstance().SyncCall(
+        (void *(*)(void *))AwtList::_IsSelected, ses) != NULL);
     // global ref and ses are deleted in _IsSelected
 
     CATCH_BAD_ALLOC_RET(FALSE);
 }