- Added SXF_TRANSFERSPECIAL and SXF_CLEARCALLERSPECIAL flags for A_SpawnItemEx.

git-svn-id: http://mancubus.net/svn/hosted/zdoom/zdoom/trunk@4199 a95907f1-e10c-0410-b46f-9e587ccb1026
- Added an enum for the values a Trace callback function can return.
- Added a userdata parameter to pass to the Trace callback function.

git-svn-id: http://mancubus.net/svn/hosted/zdoom/zdoom/trunk@4200 a95907f1-e10c-0410-b46f-9e587ccb1026
- Added FDARI's A_CheckLOF, modified to use a Trace callback function.

git-svn-id: http://mancubus.net/svn/hosted/zdoom/zdoom/trunk@4201 a95907f1-e10c-0410-b46f-9e587ccb1026
- Stop storing rail hits in a global variable, and consolidate the two railgun callbacks into a single function.

git-svn-id: http://mancubus.net/svn/hosted/zdoom/zdoom/trunk@4202 a95907f1-e10c-0410-b46f-9e587ccb1026