Fix Silverlight windowless plugin painting issues. This fixes the following...

webkit/port/bindings/v8/v8_np_utils.cpp

 // Copyright (c) 2008, Google Inc.
 // All rights reserved.
 // 
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 // 
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
@@ skipping 35 matching lines @@
                                 NPVariant* result) {
   VOID_TO_NPVARIANT(*result);
 
   // It is really the caller's responsibility to deal with the empty handle
   // case because there could be different actions to take in different
   // contexts.
   ASSERT(!object.IsEmpty());
 
   if (object.IsEmpty()) return;
 
-  if (object->IsNumber()) {
+  if (object->IsInt32()) {
+    INT32_TO_NPVARIANT(object->NumberValue(), *result);  
+
+  } else if (object->IsNumber()) {
     DOUBLE_TO_NPVARIANT(object->NumberValue(), *result);
 
   } else if (object->IsBoolean()) {
     BOOLEAN_TO_NPVARIANT(object->BooleanValue(), *result);
 
   } else if (object->IsNull()) {
     NULL_TO_NPVARIANT(*result);
 
   } else if (object->IsUndefined()) {
     VOID_TO_NPVARIANT(*result);
@@ skipping 64 matching lines @@
     // not when we use the heap.
     char stack_buf[kStackBufSize];
     str->WriteAscii(stack_buf);
     return NPN_GetStringIdentifier(stack_buf);
   }
 
   scoped_array<char> heap_buf(new char[buf_len]);
   str->WriteAscii(heap_buf.get());
   return NPN_GetStringIdentifier(heap_buf.get());
 }