vifm: suppress zathura's errors

etc/soft/vifm/filetypes

@@ -43,12 +43,12 @@ filextype *.doc,*.docx,*.xls,*.xlsx,*.rtf,*.ppt,*.pptx,*.pps,*.odt,*.ott,*.sxw,*
   \ libreoffice %f &, x-open %f
 
 " pdf
-filetype *.pdf zathura %f &, x-open %f
+filetype *.pdf zathura %f 2>&- &, x-open %f
 fileviewer *.pdf pdftotext -enc UTF-8 -nopgbrk %f -
 
 " djvu
 filextype *.djvu
-  \ zathura %f &,
+  \ zathura %f 2>&- &,
   \ qpdfview %f &,
   \ djview %f &,
   \ x-open %f