[Lazarus] Custom composite components issue with latest Lazarus

[Michael Schnell]

Lust to let you and Graeme know:

It happened again after I died a "make clean all" on Lazarus.

fpGUIPlatform was set to X11

Deleting the fpGUIPlatform again solved it: the fpGUI LCL packed got 
recompiled.

Now again setting  fpGUIPlatform to X11 again:The fpGUI LCL was 
recompiled again. No error message.

Something in the build process seems to be not perfect yet.

-Michael