vendor.c: fix vendor sort

Fix a really stupid sort function I wrote for 60b9f3360930296c0f3e8b04672b8bf7468bedcb.
Now actually does what that commit claims to do.
I think I must have just sketched it out and then forgot to go back and correct it. It's
weird that it happened to fix the one result I was testing for.

Signed-off-by: Burt P <pburt0@gmail.com>

1 files changed, 5 insertions, 4 deletions

diff --git a/hardinfo/vendor.c b/hardinfo/vendor.c
index 86705e10..f73781c3 100644
--- a/hardinfo/vendor.c
+++ b/hardinfo/vendor.c
@@ -121,11 +121,12 @@ static GSList *vendor_list = NULL;
 /* sort the vendor list by length of match_string,
  * LONGEST first */
 gint vendor_sort (gconstpointer a, gconstpointer b) {
+    const Vendor *ap = a, *bp = b;
     int la = 0, lb = 0;
-    if (a) la = strlen(a);
-    if (b) lb = strlen(b);
-    if (a == b) return 0;
-    if (a > b) return -1;
+    if (ap && ap->match_string) la = strlen(ap->match_string);
+    if (bp && bp->match_string) lb = strlen(bp->match_string);
+    if (la == lb) return 0;
+    if (la > lb) return -1;
     return 1;
 }