removed stack allocator (was unnecessary/unused)

Thanks to Brecht for the report: http://code.google.com/p/bullet/issues/detail?id=303

src/BulletDynamics/Dynamics/Bullet-C-API.cpp

@@ -43,7 +43,7 @@ subject to the following restrictions:
 #include "BulletCollision/NarrowPhaseCollision/btDiscreteCollisionDetectorInterface.h"
 #include "BulletCollision/NarrowPhaseCollision/btSimplexSolverInterface.h"
 #include "BulletCollision/NarrowPhaseCollision/btMinkowskiPenetrationDepthSolver.h"
-#include "LinearMath/btStackAlloc.h"
+
 
 /*
 	Create and Delete a Physics SDK	
@@ -373,10 +373,7 @@ double plNearestPoints(float p1[3], float p2[3], float p3[3], float q1[3], float
 	btPointCollector gjkOutput;
 	btGjkPairDetector::ClosestPointInput input;
 	
-	btStackAlloc gStackAlloc(1024*1024*2);
- 
-	input.m_stackAlloc = &gStackAlloc;
-	
+		
 	btTransform tr;
 	tr.setIdentity();