vnc: Drop superfluous conditionals around g_free()

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

ui/vnc-tls.c

@@ -443,10 +443,8 @@ static int vnc_set_x509_credential(VncDisplay *vd,
 {
     struct stat sb;
 
-    if (*cred) {
-        g_free(*cred);
-        *cred = NULL;
-    }
+    g_free(*cred);
+    *cred = NULL;
 
     *cred = g_malloc(strlen(certdir) + strlen(filename) + 2);
 

ui/vnc.c

@@ -2972,10 +2972,8 @@ static void vnc_display_close(DisplayState *ds)
 
     if (!vs)
         return;
-    if (vs->display) {
-        g_free(vs->display);
-        vs->display = NULL;
-    }
+    g_free(vs->display);
+    vs->display = NULL;
     if (vs->lsock != -1) {
         qemu_set_fd_handler2(vs->lsock, NULL, NULL, NULL, NULL);
         close(vs->lsock);
@@ -3010,10 +3008,8 @@ int vnc_display_password(DisplayState *ds, const char *password)
         return -EINVAL;
     }
 
-    if (vs->password) {
-        g_free(vs->password);
-        vs->password = NULL;
-    }
+    g_free(vs->password);
+    vs->password = NULL;
     if (password) {
         vs->password = g_strdup(password);
     }