vnc: Drop superfluous conditionals around g_free()

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
diff --git a/ui/vnc-tls.c b/ui/vnc-tls.c
index 50275de..6392326 100644
--- a/ui/vnc-tls.c
+++ b/ui/vnc-tls.c
@@ -443,10 +443,8 @@
 {
     struct stat sb;
 
-    if (*cred) {
-        g_free(*cred);
-        *cred = NULL;
-    }
+    g_free(*cred);
+    *cred = NULL;
 
     *cred = g_malloc(strlen(certdir) + strlen(filename) + 2);