Replace a workaround with a more semantic one. - In old implementation, it has not clear intention in the syntax. - I move the line doing real works into the try-except block to emphasize the intention of skipping scene nodes that is incomplete.

#!/bin/sh

autoreconf -ifs
./configure --host mipsel-linux --build i686-pc-linux-gnu --prefix ${TANGO} --disable-sh_text --with-backend=dfb
make && make install