gsm: fix invalid check in gsm48_decode_ssversion()

Change-Id: I648a4b052d0ec7af97d513630aa4279884436dda
Fixes: OS#5910
diff --git a/src/gsm/gsm48_ie.c b/src/gsm/gsm48_ie.c
index 5eca978..11b7168 100644
--- a/src/gsm/gsm48_ie.c
+++ b/src/gsm/gsm48_ie.c
@@ -825,7 +825,7 @@
 {
 	uint8_t in_len = lv[0];
 
-	if (in_len < 1 || in_len < sizeof(ssv->info))
+	if (in_len < 1 || in_len > sizeof(ssv->info))
 		return -EINVAL;
 
 	memcpy(ssv->info, lv + 1, in_len);