Small bug in dia.spec

[Jacek Pliszka]

Hi!

I tried rpm generation.

In dia.spec, in section 
%build
LINGUAS should be checked for existence:

if [ "$LINGUAS" ]; then
  unset LINGUAS
fi

Also maybe it is good to add info about RPM creation to INSTALL:

1. download dia-*.tar.gz to /usr/src/redhat/SOURCES
2. extract from there file dia.spec and put into /usr/src/redhat/SPECS
3. go to /usr/src/redhat/SPECS and run: rpm -bb dia.spec

Best Regards,

Jacek