[UDFS]

Revert r74780: it indeed works here, but when the problem happens in other places (it does!)
where it cannot be solved that way, we're doomed. It will be required to find an appropriate solution...

CORE-4375

svn path=/trunk/; revision=74805

reactos/drivers/filesystems/udfs/close.cpp

@@ -1109,6 +1109,7 @@ UDFQueueDelayedClose(
 {
     PtrUDFIrpContextLite    IrpContextLite;
     BOOLEAN                 StartWorker = FALSE;
+    BOOLEAN                 AcquiredVcb = FALSE;
     NTSTATUS                RC;
 
     AdPrint(("  UDFQueueDelayedClose\n"));
@@ -1118,6 +1119,7 @@ UDFQueueDelayedClose(
         UDFAcquireResourceExclusive(&(UDFGlobalData.DelayedCloseResource), TRUE);
 
         UDFAcquireResourceShared(&(Fcb->Vcb->VCBResource), TRUE);
+        AcquiredVcb = TRUE;
 
         if(Fcb->FCBFlags & UDF_FCB_DELETE_ON_CLOSE) {
             try_return(RC = STATUS_DELETE_PENDING);
@@ -1181,7 +1183,9 @@ try_exit:    NOTHING;
         if(!NT_SUCCESS(RC)) {
             Fcb->FCBFlags &= ~UDF_FCB_DELAY_CLOSE;
         }
-        UDFReleaseResource(&(Fcb->Vcb->VCBResource));
+        if(AcquiredVcb) {
+            UDFReleaseResource(&(Fcb->Vcb->VCBResource));
+        }
         // Release DelayedCloseResource
         UDFReleaseResource(&(UDFGlobalData.DelayedCloseResource));
     } _SEH2_END;