Index: win32ss/user/ntuser/message.c
===================================================================
--- win32ss/user/ntuser/message.c	(revision 59067)
+++ win32ss/user/ntuser/message.c	(working copy)
@@ -323,7 +323,7 @@
 
         MsgMemoryEntry = FindMsgMemory(Msg);
 
-        if ((!MsgMemoryEntry) || (MsgMemoryEntry->Size < 0))
+        if (!MsgMemoryEntry)
         {
             /* Keep previous behavior */
             return STATUS_SUCCESS;
@@ -382,11 +382,6 @@
         PMSGMEMORY MsgMemoryEntry;
         MsgMemoryEntry = FindMsgMemory(Msg);
         ASSERT(MsgMemoryEntry);
-        if (MsgMemoryEntry->Size < 0)
-        {
-            /* Keep previous behavior */
-            return STATUS_INVALID_PARAMETER;
-        }
 
         if (MsgMemoryEntry->Flags == MMS_FLAG_READWRITE)
         {