Add a cast to avoid compiler warnings.

Add a cast to avoid compiler warnings.

2005-08-30  Matthias Clasen  <mclasen@redhat.com>

	* io-png.c (png_save_to_callback_write_func): Add a cast
	to avoid compiler warnings.

	* pixops/timescale.c (main): Declare src_buf, dest_buf as
	unsigned to avoid compiler warnings.

	* gdk-pixbuf-io.h: Declare the prefix and mask members of
	GdkPixbufModulePattern as char*, to avoid compiler warnings.

	* io-ani.c (ani_load_chunk): Use g_try_new() in some places.