sed errors during configure

On some systems, sed scripts when running the configure script will fail, causing the configure step, and thus the entire build to fail. The output will look something like this

checking for clisp... /usr/bin/clisp
configure: creating ./config.status
config.status: creating Makefile
sed: file ./confstatN7A4n6/subs-4.sed line 3: unterminated `s' command
config.status: creating swig.spec
sed: file ./confstatN7A4n6/subs-4.sed line 3: unterminated `s' command
config.status: creating Source/Makefile
sed: file ./confstatN7A4n6/subs-4.sed line 3: unterminated `s' command
config.status: creating Examples/Makefile
sed: file ./confstatN7A4n6/subs-4.sed line 3: unterminated `s' command
config.status: creating Examples/guile/Makefile
sed: file ./confstatN7A4n6/subs-4.sed line 3: unterminated `s' command
config.status: creating Examples/xml/Makefile
sed: file ./confstatN7A4n6/subs-4.sed line 3: unterminated `s' command
config.status: creating Examples/GIFPlot/Makefile
sed: file ./confstatN7A4n6/subs-4.sed line 3: unterminated `s' command

This can be fixed by disabling mzscheme support. On line 13 of wxswig's Makefile, add --without-mzscheme so the full line looks something like

WXSWIG_CONFIGURE_PARAMS = --prefix=$(shell rospack find wxswig) --without-mzscheme