Make a string translatable

main.c

@@ -111,7 +111,7 @@ main(int argc, char* argv[])
   zathura_set_argv(zathura, argv);
 
   /* Init zathura */
-  if(zathura_init(zathura) == false) {
+  if (zathura_init(zathura) == false) {
     girara_error("Could not initialize zathura.");
     zathura_free(zathura);
     return -1;

zathura.c

@@ -483,7 +483,7 @@ document_info_open(gpointer data)
       file = prepare_document_open_from_stdin(document_info->zathura);
       if (file == NULL) {
         girara_notify(document_info->zathura->ui.session, GIRARA_ERROR,
-                      "Could not read file from stdin and write it to a temporary file.");
+                      _("Could not read file from stdin and write it to a temporary file."));
       } else {
         document_info->zathura->stdin_support.file = g_strdup(file);
       }