[bug#40601] [PATCH 6/7] guix-install.sh: Fix variable uses in guix_get_bin_list().

[Vincent Legoll <vincent.legoll@gmail.com>]

* etc/guix-install.sh (guix_get_bin_list)[BIN_VER]: Add missing curly-brackets,
[latest_ver]: Likewise & add explicit array zero-indexing.
---
 etc/guix-install.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/etc/guix-install.sh b/etc/guix-install.sh
index 0e6e6842a1..7d635c2c38 100755
--- a/etc/guix-install.sh
+++ b/etc/guix-install.sh
@@ -210,7 +210,7 @@ guix_get_bin_list()
         | sed -n -e 's/.*guix-binary-\([0-9.]*\)\..*.tar.xz.*/\1/p' \
         | sort -Vu)")
 
-    latest_ver="$(echo "$bin_ver_ls" \
+    latest_ver="$(echo "${bin_ver_ls[0]}" \
                        | grep -oP "([0-9]{1,2}\.){2}[0-9]{1,2}" \
                        | tail -n1)"
 
@@ -224,7 +224,7 @@ guix_get_bin_list()
     fi
 
     # Use default to download according to the list and local ARCH_OS.
-    BIN_VER="$default_ver"
+    BIN_VER="${default_ver}"
 }
 
 guix_get_bin()
-- 
2.26.2