fdo#39440 - cppcheck cleanliness

removed some cppcheck warning

Change-Id: I81963001e4737c583764b07bea9abf59a61dead7
Reviewed-on: https://gerrit.libreoffice.org/1518Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>
Tested-by: Markus Mohrhard <markus.mohrhard@googlemail.com>

lotuswordpro/source/filter/lwpbackgroundstuff.cxx

@@ -169,11 +169,8 @@ XFBGImage* LwpBackgroundStuff::GetFillPattern()
     XFBGImage* pXFBGImage = new XFBGImage();
     pXFBGImage->SetImageData(pImageBuff, nSize);
 
-    if (pImageBuff)
-    {
-        delete [] pImageBuff;
-        pImageBuff = NULL;
-    }
+    delete [] pImageBuff;
+    pImageBuff = NULL;
 
 
     pXFBGImage->SetRepeate();