WaE: implicit conversion of NULL constant to 'nullptr_t'

Change-Id: I93b22ce863294312d323184afdfe46f5a448375e

vcl/source/gdi/impfont.cxx

@@ -563,7 +563,7 @@ int FontCharMap::CountCharsInRange( sal_UCS4 cMin, sal_UCS4 cMax ) const
 
 void FontCharMap::Reset( const ImplFontCharMapPtr pNewMap )
 {
-    if( pNewMap == NULL )
+    if( !pNewMap )
     {
         mpImplFontCharMap = ImplFontCharMap::GetDefaultMap();
     }