I just spent 2 hours tracking down a bug due to the fact that some caps used a
field named "endianess" while it should be "endianness" with two 'n'.

Grepping through gst-plugins-0.8 I found the same mistake in ximagesrc.

I think it's worth adding a hook to 'make check' or 'make dist-check' in both
gst-plugins and gst-plugins-base that checks whether any of our .c files
contains the wrong string 'endianess', just to prevent anyone else from making
this mistake.

Shouldn't take more than a 

   $(EGREP) endianess `find $(top_srcdir) -name '*.c'`

with the right return value magic in Makefile.am (can't figure out the right
syntax though).

 Cheers
  -Tim