qemu-img: Fix leak

create_opts was leaked here.  This is not too bad since the process is
about to exit anyway, but relying on that does not make the code nicer
to read.

Fixes: d402b6a
Reported-by: Kevin Wolf <kwolf@redhat.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit 3ecd5a4)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

qemu-img.c

@@ -263,6 +263,7 @@ static int print_block_option_help(const char *filename, const char *fmt)
         if (!proto_drv->create_opts) {
             error_report("Protocol driver '%s' does not support image creation",
                          proto_drv->format_name);
+            qemu_opts_free(create_opts);
             return 1;
         }
         create_opts = qemu_opts_append(create_opts, proto_drv->create_opts);