don't fail if lcd filtering is not supported

This was happening on a fedora based distro

src/font/fontconfigandfreetype.rs

@@ -255,7 +255,13 @@ impl NamedFontImpl {
     /// Construct a new Font from the user supplied pattern
     pub fn new(mut pattern: FontPattern) -> Result<Self, Error> {
         let mut lib = ftwrap::Library::new()?;
-        lib.set_lcd_filter(ftwrap::FT_LcdFilter::FT_LCD_FILTER_DEFAULT)?;
+
+        // Some systems don't support this mode, so if it fails, we don't
+        // care to abort the rest of what we're doing
+        match lib.set_lcd_filter(ftwrap::FT_LcdFilter::FT_LCD_FILTER_DEFAULT) {
+            Ok(_) => (),
+            Err(err) => eprintln!("FT_LcdFilter failed: {:?}", err),
+        };
 
         // Enable some filtering options and pull in the standard
         // fallback font selection from the user configuration