add option "./configure --enable-gcc-werror" to add gcc option -Werror to CFLAGS in all Makefiles. Patch from Erik de Castro Lopo.
add option "./configure --enable-gcc-werror" to add gcc option -Werror to
CFLAGS in all Makefiles. Patch from Erik de Castro Lopo.


git-svn-id: ed696e516b63563c8842837a624e30c98be77b3c@3173 8158c8cd-e7e1-0310-9fa4-c5954c97daef

brion/liboggz,kfish/liboggz,brion/liboggz,brion/liboggz,kfish/liboggz,kfish/liboggz,brion/liboggz