(escape_deadletter): Add missing check.

@@ -292,9 +292,12 @@ escape_deadletter (int argc MU_ARG_UNUSED, char **argv MU_ARG_UNUSED,
   FILE *dead = fopen (getenv ("DEAD"), "r");
   FILE *dead = fopen (getenv ("DEAD"), "r");
   int c;
   int c;
 
 
+  if (dead)
+    {
       while ((c = fgetc (dead)) != EOF)
       while ((c = fgetc (dead)) != EOF)
 	fputc (c, ofile);
 	fputc (c, ofile);
       fclose (dead);
       fclose (dead);
+    }
   return 0;
   return 0;
 }
 }