- Separated the linedef activation types into a bit mask that allows combination

of all types on the same linedef. Also added a 'first side only' flag. This
  is not usable from Hexen or Doom format maps though but in preparation of
  the UDMF format discussed here:
  http://www.doomworld.com/vb/source-ports/43145-udmf-v0-99-specification-draft-aka-textmap/
- Changed linedef's alpha property from a byte to fixed point after seeing that
  255 wasn't handled to be fully opaque.
- fixed a GCC warning in fmodsound.cpp 

SVN r954 (trunk)

src/b_move.cpp

@@ -109,8 +109,8 @@ bool FCajunMaster::Move (AActor *actor, ticcmd_t *cmd)
 				tryit = false;
 
 			if (tryit &&
-				(P_TestActivateLine (ld, actor, 0, SPAC_USE) ||
-				 P_TestActivateLine (ld, actor, 0, SPAC_PUSH)))
+				(P_TestActivateLine (ld, actor, 0, SPAC_Use) ||
+				 P_TestActivateLine (ld, actor, 0, SPAC_Push)))
 			{
 				good |= ld == actor->BlockingLine ? 1 : 2;
 			}