Fixed linking with wxWidgets.
Enabled RTTI for non-engine packages.
Fixed wxJS for Windows.
Fixed failure to load on Windows 2000 due to IsWow64Process import.
Fixed trivial warnings.
This was SVN commit r5155.
IGUIObject: Cache the JSObject*, to prevent some frequent allocation
while running GUI scripts.
JSInterface_IGUIObject: Fixed garbage collection issues.
JSInterface_IGUIObject, ScriptGlue: Changed to the JS_THREADSAFE form of
JS_GetClass.
Util: Avoid startup warnings on Linux caused by using unimplemented
cpu_* functions that aren't needed for anything important yet.
sysdep/unix: Changed to native line endings.
This was SVN commit r5154.
