#2 Patch for compilation on Ubuntu 5.10

[Ray Ingles]

After applying John Marshall's patch, I was still
unable to finish compiling the emulator until I had
modified the #include directives in three files. (The
include files are actually named Fl_*.H, but are
specified as Fl_*.h; since Unix filesystems are
case-sensitive the include files were not found.)

I've attached a further patch that fixes this minor
problem. After this I was able to compile and use the
emulator on Ubuntu 5.10.

[Ray Ingles]

Patch to fix certain missing includes (case-sensitive names)