Free resources after parsing JPEG file.
Free resources after parsing JPEG file.

Do not forget to free resources after parsing the JPEG file, otherwise
xsetwallpaper could run out of memory.

Signed-off-by: Tobias Stoeckmann <059b8b880f8441509ec8a65b50b4c6ae74ebea76@stoeckmann.org>

stoeckmann/xwallpaper,stoeckmann/xwallpaper