dwrite: Make opentype_get_font_strings_from_id() static.

dlls/dwrite/opentype.c

@@ -1196,7 +1196,7 @@ static void get_name_record_locale(enum OPENTYPE_PLATFORM_ID platform, USHORT la
     }
 }
 
-HRESULT opentype_get_font_strings_from_id(const void *table_data, enum OPENTYPE_STRING_ID id, IDWriteLocalizedStrings **strings)
+static HRESULT opentype_get_font_strings_from_id(const void *table_data, enum OPENTYPE_STRING_ID id, IDWriteLocalizedStrings **strings)
 {
     const TT_NAME_V0 *header;
     BYTE *storage_area = 0;