vsh: fix memory leak in vshCommandParse

One of the error branches used a plain free where vshCommandFree
was required.

https://bugzilla.redhat.com/show_bug.cgi?id=1943415

Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>

tools/vsh.c

@@ -1530,7 +1530,7 @@ vshCommandParse(vshControl *ctl, vshCommandParser *parser, vshCmd **partial)
 
             if (!partial &&
                 vshCommandCheckOpts(ctl, c, opts_required, opts_seen) < 0) {
-                VIR_FREE(c);
+                vshCommandFree(c);
                 goto syntaxError;
             }