[openwrt/openwrt] base-files: minor fix to mmc_get_mac_ascii function

[LEDE Commits]

rmilecki pushed a commit to openwrt/openwrt.git, branch openwrt-23.05:
https://git.openwrt.org/9988f8adf806e84104376ad123aa38c72a01e372

commit 9988f8adf806e84104376ad123aa38c72a01e372
Author: Rodrigo Balerdi <lanchon at gmail.com>
AuthorDate: Sat Apr 6 03:18:00 2024 -0300

    base-files: minor fix to mmc_get_mac_ascii function
    
    This is mostly a cosmetic cleanup. The absence of
    the return statement was not causing any problems.
    
    Signed-off-by: Rodrigo Balerdi <lanchon at gmail.com>
    (cherry picked from commit 8cf4ac5195476356a14678ae72897e563881b15e)
---
 package/base-files/files/lib/functions/system.sh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/package/base-files/files/lib/functions/system.sh b/package/base-files/files/lib/functions/system.sh
index 107e67835a..23484c8ad9 100644
--- a/package/base-files/files/lib/functions/system.sh
+++ b/package/base-files/files/lib/functions/system.sh
@@ -205,6 +205,7 @@ mmc_get_mac_ascii() {
 	part=$(find_mmc_part "$part_name")
 	if [ -z "$part" ]; then
 		echo "mmc_get_mac_ascii: partition $part_name not found!" >&2
+		return
 	fi
 
 	get_mac_ascii "$part" "$key"