attempt to fix tdf#95935 - CRASH on startup in o3tl vcl code

I suspect that the problem is the shift and that converting it
  "1UL <<"
will fix it

Change-Id: I4808b833453a544aeb732192758d323f358c3ab0

unotools/source/config/fontcfg.cxx

@@ -988,15 +988,15 @@ FontWidth FontSubstConfiguration::getSubstWidth( const css::uno::Reference< XNam
 ImplFontAttrs FontSubstConfiguration::getSubstType( const css::uno::Reference< XNameAccess >& rFont,
                                                     const OUString& rType ) const
 {
-    unsigned long type = 0;
+    sal_uLong type = 0;
     try
     {
         Any aAny = rFont->getByName( rType );
-        if( aAny.getValueTypeClass() == TypeClass_STRING )
-        {
+        if( aAny.getValueTypeClass() != TypeClass_STRING )
+            return ImplFontAttrs::None;
         const OUString* pLine = static_cast<const OUString*>(aAny.getValue());
-            if( !pLine->isEmpty() )
-            {
+        if( pLine->isEmpty() )
+            return ImplFontAttrs::None;
         sal_Int32 nIndex = 0;
         while( nIndex != -1 )
         {
@@ -1004,12 +1004,11 @@ ImplFontAttrs FontSubstConfiguration::getSubstType( const css::uno::Reference< X
             for( int k = 0; k < 32; k++ )
                 if( aToken.equalsIgnoreAsciiCaseAscii( pAttribNames[k] ) )
                 {
-                            type |= 1 << k;
+                    type |= 1UL << k;
                     break;
                 }
         }
-            }
-        }
+        assert(((type & ~o3tl::typed_flags<ImplFontAttrs>::mask) == 0) && "invalid font attributes");
     }
     catch (const NoSuchElementException&)
     {