texlive[54622] Master/install-tl: (do_postinst_stuff): oops, ensure

[commits+karl at tug.org]

Revision: 54622
          http://tug.org/svn/texlive?view=revision&revision=54622
Author:   karl
Date:     2020-04-06 00:33:21 +0200 (Mon, 06 Apr 2020)
Log Message:
-----------
(do_postinst_stuff): oops, ensure $env_paper is
defined before testing it.

Modified Paths:
--------------
    trunk/Master/install-tl

Modified: trunk/Master/install-tl
===================================================================
--- trunk/Master/install-tl	2020-04-05 22:31:56 UTC (rev 54621)
+++ trunk/Master/install-tl	2020-04-05 22:33:21 UTC (rev 54622)
@@ -1206,9 +1206,9 @@
 
   # now work through the options if specified at all
   my $env_paper = $ENV{"TEXLIVE_INSTALL_PAPER"};
-  if ($env_paper eq "letter") {
+  if (defined $env_paper && $env_paper eq "letter") {
     $vars{'instopt_letter'} = 1;
-  } elsif ($env_paper eq "a4") {
+  } elsif (defined $env_paper && $env_paper eq "a4") {
     ; # do nothing
   } elsif ($env_paper) {
     tlwarn("$0: TEXLIVE_INSTALL_PAPER value must be letter or a4, not: "