Remove includes of <cinttypes>

Instead of including <cinttypes> directly, zm_define.h should be used
to get the typedef'ed types as well.

src/zm_ffmpeg.cpp

@@ -16,7 +16,6 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */ 
-#include <cinttypes>
 
 #include "zm_ffmpeg.h"
 #include "zm_image.h"