allow SDL 1.2 to at least do a 32767 map.  We probably should add a TryDo somewhere to assert that limit on SDL 1.2 to avoid overflows.  Ditto int version for SDL 2
This is the way I like it:
 - Only call fpc on hwengine.pas, let compiler rule the dependencies
 - Make hwengine.pas depend on all other source files, so 'make' always calls fpc
tip is no longer .20 compatible
Don't set gravity to normal immediately on turn end, let watchdog do its job if game gets frozen
Try to keep old weapon sets (not tested at all)
Special script parameter variable in game scheme
Prepend '!' to 42nd scheme parameter in network traffic
Only emit roomNameUpdated when it actually is changed
 - Utility script for parameters handling
 - Add varying gravity to Gravity script
Oops, fix message
improve OSX SDK selection when build and deploy target don't match

--HG--
branch : 0.9.20
remove one spurious WARNING tag from cmake message

--HG--
branch : 0.9.20
merge cmake osx sdk changes