8179990: Cleaner palette entry handling

Reviewed-by: prr, mschoene, rhalade

src/windows/native/sun/windows/awt_Palette.cpp

 /*
- * Copyright (c) 2001, 2008, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2017, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -148,7 +148,7 @@ int AwtPalette::FetchPaletteEntries(HDC hDC, PALETTEENTRY* pPalEntries)
         pEntry->peFlags = PC_EXPLICIT;
     }
     hPal = ::CreatePalette(pLogPal);
-    delete pLogPal;
+    delete[] pLogPal;
     if ( hPal == 0 ) {
         return 0;
     }