add FilterRec() so it links again

git-svn-id: http://skia.googlecode.com/svn/trunk@370 2bbb7eff-a529-9590-31e7-b0007b416f81

src/ports/SkFontHost_none.cpp

@@ -32,6 +32,9 @@ SkTypeface* SkFontHost::CreateTypefaceFromFile(char const*) {
     return NULL;
 }
 
+void SkFontHost::FilterRec(SkScalerContext::Rec* rec) {
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 
 bool SkFontHost::ValidFontID(uint32_t uniqueID) {