Resynchronize order of DMAPContentCode and DMAPContentCodeDefinition definitions
Resynchronize order of DMAPContentCode and DMAPContentCodeDefinition definitions

The definitions of DMAPContentCode and DMAPContentCodeDefinition had
gotten out of sync. This was causing a crash when serving DPAP because
libdmapsharing was treating a particular version number content code as
a string.

Signed-off-by: W. Michael Petullo <a17fed27eaa842282862ff7c1b9c8395a26ac320@flyn.org>

wangd/libdmapsharing,GNOME/libdmapsharing,GNOME/libdmapsharing,wangd/libdmapsharing,GNOME/libdmapsharing