[GDL] build problems

["John (J5) Palmieri" <johnp martianrock com>]

I ran into a couple of build problems with GDL.  

* -fno-strict-aliasing needs to be set as a build flag or it will warn
on (gpointer *) &widget.  Since -Werror is set this causes GDL not to
build.

* libssl development files are needed for the build (why do we use SSL?)
but does not error out when running ./configure.

-- 
J5