[CMake] FindASPELL.cmake finds /usr/bin/aspel with Find_Library

[Bill Hoffman]

Steven Van Ingelgem wrote:
> Personally I would expect it to find /usr/lib/libaspell.so.15, not a
> directory... (on my system /usr/lib/aspell is a dir)
> 

OK, read the email too quick.  I think I know what is causing this.  I 
will work on a fix...

-Bill