[CMake] Segfault with MacOS bundles

[Joshua Jensen]

With latest CVS (in an attempt to see if the problem was fixed), I was 
attempting the following:

        SET_SOURCE_FILES_PROPERTIES(Somefile.dat PROPERTIES 
MACOSX_PACKAGE_LOCATION Resources)

This works great and does exactly what I expected it would do (assuming 
it doesn't copy each and every time I build... haven't verified that yet).

Unfortunately, having Somefile.dat in the SRCS list causes Xcode to spit 
out the following:

        warning: no rule to process file '/Users/.../somefile.dat' of 
type file for architecture i386

My common way of getting rid of that warning is doing this:

        SET_SOURCE_FILES_PROPERTIES(Somefile.dat HEADER_FILE_ONLY true)

This usually works, but when combined with the MACOSX_PACKAGE_LOCATION 
property above, ccmake generates a segfault on configure.

Is there another way of getting rid of the 'no rule' warning?

Thanks.

Josh