Update to ZDoom r1344:

- Fixed: SBARINFO used GetSpecies instead of GetClass to check weapon types.
- Added a few missing NULL pointer checks to SBARINFO code.
- Changed pickup sounds of local player to unpaused to resolve problems with 
  the time freezer and make them behave better.
- Fixed: When sounds are paused not all newly started sounds should actually
  be played.
- Fixed: SBARINFO had no means to check if a weapon uses any ammo at all and
  as a result the inventory icon was misplaced if a no-ammo weapon was selected.
- Fixed: P_CheckMissileSpawn and AFastProjectile didn't adjust their
  calculations for missiles with small radii.
- Added a new aiming mode to A_CustomRailgun to aim directly at the target
  from the actual point the shot originates from.
- Added a constant name for Skulltag's 128 flag for A_SpawnItemEx. For 
  compatibility ZDoom needs to define this name, too, even though it doesn't 
  use it.
- Fixed: The nodebuilder could hang on badly set up polyobjects. Now it aborts 
  when the loop iterates NumberOfSegs times.
- Fixed: FMOD calls for setting the water reverb must check the return code
  for errors.
- Fixed: Hexen's dual attack weapons must check distance to targets in 3D,
  not 2D.
- Made several DECORATE errors which do not involve parsing non-fatal.
- Added a static error counter to FScriptPosition class.
- Changed initialization of actor class type properties: fuglyname is gone as
  is the postprocessing in FinishThingdef. Instead an empty placeholder class
  is now created when a class is first referenced and this placeholder is later
  filled in. 
- Added option to replace backslash with '^' in state frame definitions because
  the backslash is just causing too many problems because it's also an escape
  character.


git-svn-id: http://mancubus.net/svn/hosted/gzdoom/trunk@282 b0f79afe-0144-0410-b225-9a4edf0717df

src/nodebuild_utility.cpp

@@ -440,6 +440,7 @@ bool FNodeBuilder::GetPolyExtents (int polynum, fixed_t bbox[4])
 	{
 		vertex_t start;
 		unsigned int vert;
+		unsigned int count = 0;
 
 		vert = Segs[i].v1;
 
@@ -451,7 +452,8 @@ bool FNodeBuilder::GetPolyExtents (int polynum, fixed_t bbox[4])
 			AddSegToBBox (bbox, &Segs[i]);
 			vert = Segs[i].v2;
 			i = Vertices[vert].segs;
-		} while (i != DWORD_MAX && (Vertices[vert].x != start.x || Vertices[vert].y != start.y));
+			count++;	// to prevent endless loops. Stop when this reaches the number of segs.
+		} while (i != DWORD_MAX && (Vertices[vert].x != start.x || Vertices[vert].y != start.y) && count < Segs.Size());
 
 		return true;
 	}